RU175434U1 - Replaceable screw bit - Google Patents

Abstract

The interchangeable bit for tightening the screws consists of a main part, which includes a shank, an installation sleeve, a retaining ring and a damping element. The shank includes a tip, an annular groove behind the tip, a smaller diameter element behind the annular groove, and a shoulder behind the smaller diameter element. The installation sleeve includes a first section and a second section, which is smaller than the first section. The first section includes a thrust end, and an annular groove adjacent to a solid surface. An axial channel is formed behind the annular groove. The second section includes an axial passage and a step transition. The snap ring can be installed in a stepped transition. The damping element is located in the axial channel opposite the retaining ring and includes an axial tunnel. The tip is installed in the axial passage, the axial tunnel and the annular groove.

Description

BACKGROUND

1. The technical field

This utility model relates to devices for tightening screws, more precisely, to a replaceable bit for tightening screws, which is perfect for woodworking, is easy to install, capable of absorbing mechanical shocks, and improves productivity and accuracy.

2. Description of the Related Art

From TWM522813 (B25B 23/12, published 01.06.2016), a replaceable bit for screw tightening is known. The interchangeable bit shown in FIG. 6 and 7, consists of a shank 50 and an installation sleeve 52. The shank 50 includes a tip 501 and an annular groove 502 between the tip 501 and the main part of the shank 50. A snap ring 62 is installed in the groove 502. The installation sleeve 52 includes a first section 521 and a second section 522 which is smaller than section 521. A stop end 54 is formed at one end of the first section 521. The axial channel 56 passes through the first section 521 to receive a magnetic element 58, which includes an axial tunnel 581. An opening 523 is made at one end of the second section 522. The gap 60 deal between the opening 523 and the channel 56. The hole 523, the gap 60 and the duct 56 are interconnected. The tip 501 is fixed in the installation sleeve 52 and the tunnel 581 with the locking ring 62 are installed in the gap 60. This decision was made as a prototype.

While the magnetic element 58 can tighten the screw, the channel 56, most of which is occupied by the magnetic element 58, can have much less space for temporary storage of wood chips produced by the tip 501 during twisting. Thus, wood shavings can fall to the floor. In addition, the twisting of the tip 501 can be stopped if there are too many wood shavings in front of the tip 501. In addition, installing the retaining ring 62 in the gap 60 is a complex assembly step, which will complicate the production processes. Therefore, improvements are required.

ESSENCE OF A USEFUL MODEL

One of the objectives of the utility model is to provide bits for tightening screws, which will consist of a main part, a shank, an installation sleeve, a retaining ring and a structural element that absorbs shock; wherein the shank includes a tip, an annular groove behind the tip, an element of smaller diameter behind the annular groove, and a shoulder behind the element of smaller diameter; in which the diameter of the annular groove is smaller than the tip; in which the diameter of the annular groove is less than that of an element of a smaller diameter; in which the installation sleeve includes a first and second section, where the second section is smaller than the first; in which the first section includes a thrust end at one end, and an annular groove adjacent to the thrust end; in which the axial channel is formed behind the annular groove and has a diameter less than that of the annular groove; in which the second section includes a thrust surface at the opposite end of the sleeve, an axial passage adjacent to the thrust surface, a step transition formed between the axial passage and the axial channel with a diameter larger than the axial passage and smaller than the axial channel; in which the axial stepped passage consists of an annular groove, an axial channel and a stepped transition; in which the axial channel is connected to the axial stepped passage; in which the circlip snaps into a stepped transition; in which the damping element is located in the axial channel, opposite the retaining ring, and includes an axial tunnel; and in which the tip is inserted through an axial passage, an axial tunnel, and an annular groove with a spring ring, and snaps into the annular groove.

Preferably, the element of smaller diameter was made in cylindrical shape, and the diameter of the element of smaller diameter is smaller than the straight line connecting the center of the shoulder with two points on the shoulder, and the diameter of the element of smaller diameter is smaller than the axial passage.

In a preferred embodiment, the magnetic element further comprises an axial tunnel element, the magnetic element is located in the axial channel opposite the damping element, and the tip passes through the axial tunnel element.

The utility model has the following advantages compared with the prior art:

The tip is inserted into the slotted head of the screw. Rotation of the shank rotates the tip in the damping and magnetic elements. Next, the screw is screwed into the wall. Wood shavings formed during twisting fall through the gutter where they accumulate. The twisting stops when the thrust end of the installation sleeve reaches the wall and the shoulder contacts the contact surface at the opposite end of the installation sleeve. The depth of twisting into the wall is selected by the user. The shank can be replaced with a new one if the tip is worn. Thus, production costs are significantly reduced.

The annular groove of the axial step passage has a diameter larger than that of its channel, and the step transition of the axial step passage has a diameter smaller than that of its channel. An axial stepped passage is technologically easy to obtain. The snap ring can be installed in a stepped transition. A worn snap ring can easily be replaced with a new one by removing the damping and magnetic elements from the axial stepped passage just before the replacement.

The twisting stops when the thrust end of the installation sleeve reaches the wall and the shoulder contacts the contact surface at the opposite end of the installation sleeve. Thus, excessive penetration of the screw into the wall can be prevented. A smaller diameter element controls the stock of the shank. In addition, the smaller diameter element begins to function as a buffer distance between the shoulder and the abutment surface at the opposite end of the installation sleeve when the main part is twisted.

The damping element can absorb mechanical shocks of the rotating tip in order to increase accuracy.

Wood shavings formed during twisting fall through the gutter where they accumulate.

The magnetic element has a strong magnetic effect and is configured to position the screw at a small distance from the tip using magnetic attraction. The tip is stable in operation. Thus, increased productivity.

The above and other objectives, features and advantages of this utility model will become apparent from the following detailed description, given with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an image of an interchangeable bit for tightening screws in accordance with this utility model;

FIG. 2 - image of a removable bit for tightening screws disassembled with a partial cut;

FIG. 3 is a partial vertical section through an interchangeable bit for tightening the screw assembly;

FIG. 4 and 5 are a longitudinal sectional view of an interchangeable bit for tightening screws in a tightening process;

FIG. 6 is an image of a conventional interchangeable bit for tightening screws disassembled with a partial cut;

FIG. 7 is the same view as in FIG. 6, which represents an interchangeable bit for tightening the screws assembly.

DETAILED DESCRIPTION OF A USEFUL MODEL

According to FIG. 1 and 5, the interchangeable bit for tightening screws in accordance with this utility model consists of a main body 10, a shank 12, an installation sleeve 20, a retaining ring 30 and a damping element 32. The shank 12 includes a tip 18, an annular groove 16 behind the tip 18, a smaller element a diameter of 14 behind the annular groove 16, and a shoulder 121 behind the element of smaller diameter 14. The diameter of the annular groove 16 is smaller than that of the tip 18. In addition, the diameter of the annular groove 16 is smaller than that of the element of smaller diameter 14.

The mounting sleeve 20 includes a first section 22 and a second section 24, which is smaller than section 22. At the end of the first section 22, a solid stop face 221. An annular groove 261 abuts the element of the stop face 221. An axial channel 262 is formed behind the annular groove 261 and has the diameter is smaller than that of the annular groove 261. At the end of the second section 24, opposite from the stop end 221, a stop surface 241 is made. An axial passage 264 is adjacent to the stop surface 241. A step transition 263 is formed between the axial passage 264 and the axial channel 262, and a diameter greater than the diameter of the axial channel 262. The diameter of the step transition 263 is smaller than that of the axial channel 262. The passage of the step diameter 26 includes an annular groove 261, an axial channel 262 and a step transition 263. The axial passage 264 is connected to the axial step passage 26. Lock ring 30 can be installed in a stepped transition 263. The damping element 32 is located in the axial channel 262 and opposite the locking ring 30. The damping element 32 includes an axial tunnel 321. The tip 18 is fixed through the passage 364, and the axial tunnel 321 and the rings groove 261 with snap ring 30 in groove 16.

Preferably, the element of smaller diameter 14 was made in a cylindrical shape. The diameter of the element of smaller diameter 14 is smaller than the straight line connecting the center of the shoulder 121 with two points on the shoulder 121. In addition, the diameter of the element of smaller diameter 14 is smaller than that of the axial passage 264.

Preferably, the cylindrical magnetic element 34 including the axial tunnel element 341 are located in the axial channel 262 opposite the absorbing element 32. That is, the damping element 32 is located between the retaining ring 30 and the magnetic element 34. Further, the tip 18 passes through the axial tunnel element 341.

According to FIG. 2, 4 and 5, the tip is inserted into the slotted head of the screw 40. Rotation of the shank 12 rotates the tip 18 in the absorbing 32 and magnetic 34 elements. Next, the screw 40 is screwed into the wall 42. The wood shavings 44 generated during the twisting fall through the groove 261, where they accumulate. The twisting stops when the abutment end 221 reaches the wall 42 and the shoulder 121 contacts the abutment surface 241 at the opposite end of the installation sleeve. It is provided that the user selects the depth of twisting 40 into the wall 42.

It is noted that the magnetic element 34 has a strong magnetic effect and is configured to position the screw 40 at a small distance from the tip using magnetic attraction. Also, the damping element 32 can absorb mechanical shocks of the rotating tip in order to improve accuracy.

While the utility model has been described in terms of preferred embodiments, those skilled in the art will appreciate that the utility model can be implemented in practice with modifications within the spirit and scope of the attached utility model formula.

Claims (3)

1. A bit for tightening screws, consisting of a main part, which includes a shank with a tip, an installation sleeve, a retaining ring, a damping element and a magnetic element, characterized in that the shank is made with an annular groove behind the tip and a smaller diameter element made behind the annular groove and a shoulder made behind the element of smaller diameter, while the diameter of the annular groove is less than the diameter of the tip and less than that of the element of smaller diameter, and the installation sleeve has a first the section and the second, while the first section is made with a thrust end at its end, with an annular groove made adjacent to the thrust end, and with an axial channel formed behind the annular groove having a diameter smaller than that of the annular groove, while the second section is made with a thrust surface at the end of the installation sleeve opposite the thrust end of the first section, and with an axial passage made between the thrust surface and the step transition formed between the axial passage and the axial channel of the first section and having m diameter larger than the diameter of the axial passage and smaller than the diameter of the axial channel, while the mounting sleeve is made with an axial step passage formed by an annular groove, an axial channel and an axial step transition, while the retaining ring is installed in a step transition, the damping element is located in the axial channel between the locking ring and the magnetic element mounted in the axial tunnel, and the tip is fixed in a stepped passage through the locking ring, in the axial tunnel and in the annular groove, however, the element of smaller diameter has the ability to provide a buffer distance between the shoulder and the thrust surface when twisting the main part of the bit, and the element of smaller diameter has a diameter less than the diameter of the axial passage. 2. A bit for tightening screws according to claim 1, characterized in that the element of smaller diameter has a cylindrical shape. 3. The bit for tightening the screws according to claim 1, characterized in that the tip is made passing through an axial tunnel.

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