RU214985U1 - Adapter head with guide lock for fasteners - Google Patents

Abstract

The utility model relates to a hand-held fitter's and assembly tool, namely to an adapter head device with a guide lock for fasteners, which can be used for screwing and unscrewing cylindrical fasteners with a central hole and a slot at the end, for example, in the form of round racks with a slot on the end with a threaded end, in products of general engineering. The adapter head for fasteners consists of two parts, monolithically connected to each other, one of which is equipped with faces for interaction with a wrench, and the other part is a cylindrical shell equipped with means for engaging with the fastener, made in the form of protrusions. At the same time, in order to be able to interact with a cylindrical fastener with a central hole and a slotted groove in the end surface, the adapter head is equipped with a guide pin-lock, the protrusions are rectangular in shape and are located symmetrically relative to the axes of the adapter head adjoining the end surface of the cylindrical shell, on the side of which an internal cavity is made, in which the specified fixing pin is placed and rigidly fixed, partially protruding beyond the end surface of the cylindrical shell, while the end surface of the protruding part of the fixing pin is different from flat. EFFECT: ensuring high accuracy of adapter head locating when screwing and unscrewing cylindrical fasteners with a central hole and a slotted groove in the end surface in places with limited access, and eliminating the possibility of damaging the threaded surface of the fastener. 1 w.p. f-ly, 5 ill.

Description

The utility model relates to a hand-held fitter's and assembly tool, namely to an adapter head device with a guide lock for fasteners, which can be used for screwing and unscrewing cylindrical fasteners with a central hole and a slot at the end, for example, in the form of round racks with a slot at the end and threaded end, in products of general engineering.

Known from the prior art is a BITS DIN3127/ISO 2351 screwdriver bit for screws with a simple slot (STAHLWILLE Catalog Program 2008/2009 p. 152), containing a cylindrical rod, one of the ends of which is made as a working one, turning into a blade with parallel working planes, reciprocal fastener slot surface, and a hexagonal shank adjacent on the other side.

A screwdriver for slotted screws is known from the prior art (Patent RU No. 2072909, 1st version, IPC: B25V 15/00, published in 1997), containing a rod, at least one of the ends of which is made by a worker. The working end is made in the form of a protrusion with parallel working planes, mating the surface of the screw slot and a length of 1.52 of the depth of the slot of the latter.

The disadvantage of these devices is the low accuracy of basing (positioning) of the tool when screwing and unscrewing fasteners.

A special screwdriver nozzle is also known from the prior art (Patent RU No. 188583, IPC: B25V 23/08, published in 2019), containing a rod with a blade on the side of the working end and a shank adjacent on the other side. The blade is made in the form of a plate of constant thickness, while on the side of the free end of the blade there is a profile groove of a trapezoidal shape in plan, forming a central working area, the surfaces of which are in contact with the mating surfaces of the slot of the fastener head, and its length L is selected from the condition: L=0 ,8h, where h is the depth of the slot of the head of the fastener. In this case, the side surfaces of the profile groove are identical to the side surface of the head of the fastener.

The disadvantage of this device is screwing and unscrewing only fasteners in the form of mounting racks with a head in the form of a truncated cone and a simple slot.

The closest in technical essence and achieved results to the proposed technical solution is a cap-adapter for unscrewing and tightening fasteners of car wheels, which has protection against unauthorized unscrewing (Patent RU No. 138826, IPC: V60V 7/16, published in 2014), characterized in that it consists of two parts, monolithically connected to each other, the first of which is equipped with faces for interaction with a wrench, while the second part is a thick-walled cylindrical shell, the inner side of the wall of which has means for engaging with the head of the fastener, made in the form of protrusions, at least two of which are made of different shapes and/or located with different angular displacements relative to the longitudinal axis of the key, to interact with the corresponding depressions of the fastener, which is protected from unauthorized removal.

The technical problem solved by the creation of this utility model lies in the low accuracy of locating (positioning) the tool in the splined groove of cylindrical fasteners with a central hole and a splined groove in the end surface when they are screwed and unscrewed in places with limited access, for example, when screwing and unscrewing cylindrical racks with a slot at the end.

The technical result to be achieved by the claimed technical solution is to create an adapter head with a guide latch for cylindrical fasteners with a central hole and a slotted groove in the end surface, which ensures high accuracy of its basing (positioning) when screwing and unscrewing these fasteners in places with limited access, and excluding the possibility of violation of the threaded surface of the fastener.

The achievement of the technical result is ensured by changing the design of the closest analogue. Unlike the prototype, in the proposed adapter head with a guide latch for fasteners, the protrusions have a rectangular shape in plan and are made symmetrically relative to the axes of the adapter head adjoining the end surface of the cylindrical shell, on the side of which an internal cavity is made, in which is placed and rigidly fixed pin-lock, partially protruding beyond the end surface of the cylindrical shell. In this case, the end surface of the protruding part of the fixing pin is different from flat, and the height of the protruding part of the fixing pin and the inner diameter of the threaded hole of the fastener are selected from the condition:

H / d ₁ \u003d 1.05 ... 1.1, where

H is the height of the protruding part of the fixing pin;

d ₁ - inner diameter of the threaded hole of the fastener.

The essence of the utility model is illustrated by drawings, where:

Fig. 1 - general view of the adapter head with a guide lock for fasteners;

Fig. 2 - view A of Fig. one;

Fig. 3 - view B of FIG. one;

Fig. 4 is a section B-B of FIG. 3;

Fig. 5 is a general view of a cylindrical fastener with a central hole and a slotted groove in the end surface.

The head-adapter with a guide latch for fasteners consists of two parts 1 and 2 (Fig. 1, 3), symmetrical about the vertical axis and monolithically connected to each other.

The first part 1 is a thick-walled cylindrical shell in the form of an elongated cylindrical cup with an internal cavity 3 (Fig. 4) formed from the side of the end surface 4 (Fig. 1, 2, 4), and has means for engaging with the fastener, made in the form of protrusions 5, 6 (Fig. 2), adjacent to the end surface 4.

The protrusions 5, 6 have a rectangular shape in plan, are made with a constant thickness and symmetrically with respect to the axes of the adapter head, while the height of the protrusions h (Fig. 1) and their width s (Fig. 1) are in the following relationship:

h/s=1.2…1.4

where h is the height of the protrusion;

s is the width of the protrusion.

In the inner cavity 3 of the housing 1, a pin-lock 7 (Fig. 1, 2, 4) is placed and rigidly fixed, made cylindrical, with a diameter d (Fig. 2, 4), and partially protruding beyond the end surface 4. At the same time, the protruding part 8 of the pin-lock 7 has an end surface 9 other than flat, and made, for example, in the form of a truncated cone (Fig. 3).

The height H (Fig. 1) of the protruding part 8 of the fixing pin 7 and the inner diameter d ₁ (Fig. 5) of the threaded hole of the fastener 10 (Fig. 5) are selected from the condition:

H / d ₁ \u003d 1.05 ... 1.1

where H is the height of the protruding part 8 of the pin-lock 7;

d ₁ - inner diameter of the threaded hole of the fastener 10.

The diameter d of the fixing pin 7 and the inner diameter d _{1 of} the threaded hole of the fastener 10 are selected from the condition:

d ₁ /d=1.02…1.1

where d ₁ is the inner diameter of the threaded hole of the fastener 10;

d - diameter of pin-lock 7.

The execution of the end surface 9 of the protruding part 8 of the pin-lock 7 is different from flat, for example, in the form of a truncated cone, ensures the accuracy of basing (positioning) of the pin-lock 7 in the inner hole of the fastener 10, for example, in the form of a round rack with a slot at the end, as well as the accuracy of the basing (positioning) of the protrusions 5, 6 in the slotted groove of the fastener.

The height L (Fig. 3) of the first part 1 and the height L ₁ (Fig. 3) of the second part 2 may vary depending on the technological features of the adapter head.

To ensure ergonomics on the outer side cylindrical surface 11 (Fig. 1, 3) of the first part 1 knurled 12 (Fig. 1, 3, 4) is made, under which the marking 13 (Fig. 3) is made, corresponding to the value of the diameter d ₁ (Fig. 5) threaded hole of fastener 10.

The second part 2 (Fig. 1.3) is provided with edges and is made, for example, in the form of a hexagon with an external dimension of 1/4", 5/16" in accordance with DIN3127 / ISO2351 form C6.3 or C8, which allows you to use for work with an adapter head, various holders for BITS type nozzles with the same size for installing a tool, as well as wrenches (for example, one-sided open-end wrenches GOST2841-80, double-sided open-end wrenches GOST 2839-80, socket wrenches with internal hexagon double-sided GOST 25789 - 83, etc.) of various sizes.

Work head-adapter with a guide lock for fasteners as follows.

For work, for example, holders for nozzles of the BITS type or wrenches are used, with which the second part 2 (Fig. 1, 3) of the adapter head easily interacts through its edges, made, for example, in the form of a hexagon with an external size of 1/4 " , 5/16" according to DIN3127/ISO2351 form C6.3 or C8.

The protruding part 8 with a height H of the fixing pin 7 (Fig. 1, 2, 4) is placed in a threaded hole with a diameter d _{1 of} the fastener 10 (Fig. 5), and the protrusions 5, 6 (Fig. 2) are made with a height h and a width s are brought into contact with the mating surfaces of the slot of the fastener 10, for example, a round mounting rack with a slot at the end, with a central threaded hole and a threaded end, and it is screwed or unscrewed using this hand-held bench and assembly tool in products of general engineering with limited access.

Claims (5)

1. Adapter head for fasteners, consisting of two parts, monolithically connected to each other, one of which is equipped with edges for interaction with a wrench, and the other part is a cylindrical shell equipped with means for engaging with a fastener, made in in the form of protrusions, characterized in that for the possibility of interacting with a fastener of a cylindrical shape with a central hole and a slotted groove in the end surface, the adapter head is equipped with a guide pin-lock, the protrusions are rectangular in shape and are located symmetrically relative to the axes of the adapter head adjoining the end surface of the cylindrical shell, on the side of which an internal cavity is made, in which the specified fixing pin is placed and rigidly fixed, partially protruding beyond the end surface of the cylindrical shell, while the end surface of the protruding part of the fixing pin is different from flat. 2. Adapter head for fasteners according to claim 1, characterized in that the height of the protrusions and their width are related by the ratio: h/s = 1.2…1.4, where h is the height of the protrusion; s is the width of the protrusion.

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