RU158161U1 - DEVICE FOR INSTALLATION IN A SCREWDRIVER'S CARTRIDGE FOR SCREWING OF THE SELF-CUTTERS - Google Patents

Abstract

1. A device for holding and installing self-tapping screws in a screwdriver chuck, comprising an adapter with a bat, comprising a self-tapping screw holder mounted on a bit adapter, characterized in that the self-tapping screw holder is made in the form of a collets of variable cross-section, cut along the entire axis into two parts, which are pressed against the housing of the adapter ring springs covering the collet from the outside, while the inner surface of the collet has a cylindrical section for interfacing with the adapter bits, a cylindrical section made with the possibility of contact with the rod we take a self-tapping screw and a cross-sectional diameter corresponding to the diameter of the self-tapping rod, and a conical section for connecting the first and second cylindrical sections, while on the outer surface of the collet there are transverse grooves for installing the springs and an opening between the two petals of the collet, formed by a recess on their side faces, for dragging self-tapping head. 2. The device according to claim 1, characterized in that the annular springs for compressing the collet petals are made in the form of rubber rings placed in the transverse grooves. 3. The device according to claim 1, characterized in that the annular springs for compressing the petals of the collet are made in the form of metal rings placed in the transverse grooves.

Description

The utility model relates to the field of tooling, and relates to the design of the device for equipping screwdrivers, in particular, a device is proposed for holding self-tapping screws in the adapter for bits and direction when screwing into wood and metal products during installation work.

The closest to the proposed utility model in terms of essential features is an adapter for bits with a ZUBR guide sold under the EXPERT trademark; this adapter is made with a guide for fasteners and a bit holder (80 mm) Bison 26752-080_z01 (information is available on the website "All instruments" in the Internet 06.07.2014 at the following address: http://www.vseinstrumenti.ru/rashodnie_materialy/instrument/dlya_gaykovertov_vintovertov_i_shurupovertov/perehodniki/adaptery_magnitnye_dlya_bit_shurupoverta/zubr/adapter_spetsialnyi_s_napravlyayuschey_i_derzhatelem_dlya_napravleniya_bit_80mm_26 752-080_z01 /) (chosen as a prototype).

The composition of the known device includes a bit adapter, a cylindrical guide in the form of a thin-walled tube for moving the adapter, as well as two ring springs on the adapter to limit the stroke.

The disadvantage of this device is the lack of radial fastening of the self-tapping screw installed in the cylindrical guide of the adapter, which leads to its displacement and significant runout when screwed. This is due to the fact that the internal size of the tube, which is a cylindrical guide, is selected based on the shape and size of the head of the self-tapping screw. And the core part of the self-tapping screw with a thread is not fastened. Therefore, the core part of the self-tapping screw in such a tube is deflected and pressed against the wall of this tube. To properly screw in the screw, the operator must first align the position of the screw with the direction of screwing, which requires some skill and experience.

This utility model is aimed at achieving a technical result, which consists in increasing the reliability of fastening a self-tapping screw along its rod element and stabilizing its axial position by eliminating the radial runout of a self-tapping screw when screwing in.

The specified technical result is achieved by the fact that in the device for installation in a screwdriver chuck for screwing in self-tapping screws, containing an adapter with a bat, containing a self-tapping screw holder mounted on a bit adapter, the self-tapping screw holder is made in the form of a metal or plastic collet of variable cross section, cut along two axis along two axis parts that are pressed against the adapter body by ring springs covering the collet from the outside, while the inner surface of the collet has a cylindrical section for interfacing with the adapter bits a cylindrical section made with the possibility of contact with the self-tapping rod and corresponding in diameter to the transverse dimension of the self-tapping rod, and a conical section for connecting the first and second sections, while on the outer surface of the collet there are transverse grooves for installing springs and an opening between two collets formed by a recess on lateral sides of the collet petals for pulling the head of the screw.

In this case, ring springs for compressing the collet petals can be made in the form of rubber or metal rings placed in the transverse grooves.

With this design, the device provides reliable basing of the self-tapping screw in the direction of screwing.

These features are significant and are interconnected with the formation of a stable set of essential features sufficient to obtain the desired technical result.

The present utility model is illustrated by a specific example of execution, which, however, is not the only possible one, but clearly demonstrates the possibility of achieving the required technical result.

The essence of the proposed device is illustrated by drawings, where

in FIG. 1 is a side view of the device;

FIG. 2 is a longitudinal section of the device;

FIG. 3 is a longitudinal section of the device at the end of the screwing cycle.

According to this utility model, the design of a device - a holder for self-tapping screws is considered, which provides for basing a self-tapping screw in the direction of its screwing.

In general, a device for installing in a screwdriver chuck for screwing in self-tapping screws containing an adapter with a bat is a self-tapping screw holder mounted on the bit adapter.

This self-tapping screw holder is made in the form of a metal or plastic collet of variable cross section, cut along the entire axis into two parts, which are pressed to the adapter body by ring rubber or metal springs, covering the collet from the outside.

The inner surface of the collet has a cylindrical section for interfacing with the adapter bits, a cylindrical section made with the possibility of contact with the self-tapping rod and corresponding in diameter to the transverse dimension of the self-tapping rod, and a conical section for connecting the first and second sections.

On the outer surface of the collet there are transverse grooves for installing ring springs and a hole between the two collets, formed by a recess on the side faces of the collet petals for pulling the head of the self-tapping screw.

The following is a specific example of a utility model.

The device includes a bit adapter 1, in which one of the known methods attaches a bit 2, a collet of variable cross section 3, cut along the entire axis, ring springs 4 for pressing the petals of the collet to the adapter. The inner surface of the collet has a cylindrical surface for basing bits on the adapter body, a cylindrical surface for holding the self-tapping rod, a conical one for expanding the collet petals when screwing is completed. Transverse grooves 5 are made on the outer surface of the collet to accommodate the springs, hole 6 is between two collets, formed by a recess on the side faces of the collet petals for the passage of the head of the self-tapping screw 7, with a radial load.

The device operates as follows.

The device is mounted in a screwdriver chuck 9, then a self-tapping screw 7 is installed in the device and is engaged with bit 2, a part of the self-tapping screw protrudes from the device (Fig. 1). When the protruding part of the self-tapping screw is screwed into the surface 8 of the part 1, 2, 3, the devices rotate together (Fig. 2), but after the end of the collet touches the surface 8, the collet rotation stops, the collet petals begin to open by sliding the self-tapping head on the conical surface of the petals and pass the head of the self-tapping screw outward until the screw is completely screwed in (Fig. 3).

To repeat the cycle, you must manually return the collet to its original position and install the following self-tapping screw into the device. In this case, the collet petals under the action of the springs are reduced and reliably hold the self-tapping screw along the diameter of the rod (Fig. 1).

The utility model allows to expand technological capabilities, increase productivity and improve convenience, increase injury safety (there is no need to hold a self-tapping screw with your hand at the beginning of screwing). These advantages are ensured by the fact that the reliability of fixing the self-tapping screw along its rod element and the stabilization of its axial position due to the exclusion of the radial runout of the self-tapping screw when screwing is increased.

Claims (3)

1. A device for holding and installing self-tapping screws in a screwdriver chuck, comprising an adapter with a bat, comprising a self-tapping screw holder mounted on a bit adapter, characterized in that the self-tapping screw holder is made in the form of a collets of variable cross-section, cut along the entire axis into two parts, which are pressed against the housing of the adapter ring springs covering the collet from the outside, while the inner surface of the collet has a cylindrical section for interfacing with the adapter bits, a cylindrical section made with the possibility of contact with the rod we take a self-tapping screw and a diameter corresponding to the transverse dimension of the self-tapping rod, and a conical section for connecting the first and second cylindrical sections, while on the outer surface of the collet there are transverse grooves for installing springs and an opening between two petals of the collet formed by a recess on their side faces for pulling self-tapping heads. 2. The device according to p. 1, characterized in that the annular springs for compressing the petals of the collet are made in the form of rubber rings placed in the transverse grooves. 3. The device according to claim 1, characterized in that the annular springs for compressing the petals of the collet are made in the form of metal rings placed in the transverse grooves.

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