RU194919U1 - Adjustable Torque Wrench for Electrical Components - Google Patents

Abstract

The utility model relates to the design of hand tools, namely, wrenches with adjustable torque and can be used for mounting and dismounting electrical and radio components with threaded fasteners in general engineering products. The adjustable torque wrench for electro-radio components comprises a leash pivotally connected to a handle, in which a latch with a calibrated spring is placed, which keeps the leash from turning relative to the handle until a predetermined torque value is reached. The leash is made with a groove in the end surface of the base, interacting with the latch, and placed in the groove of the handle. A tared spring is placed between the stop and the stem. The end surface of the base of the leash is made curved, at the base of the leash is additionally made a symmetrical through window of a curved shape in plan, interacting with the latch-limiter located in the walls of the groove of the handle. In this case, the latch interacts with the end surface of the stop and is placed in the cylindrical hole of the handle commensurate with it, located on the same axis with the handle groove connected to it, the groove in the end surface of the base of the leash and the axis pivotally connecting the leash to the handle. The technical result consists in the manufacturability of the assembly and disassembly of threaded joints, as well as in the possibility of fixing the mechanism for regulating torque during disassembly of threaded joints. 4 s.p. f-ly, 6 ill.

Description

The utility model relates to the design of hand tools, namely, wrenches with adjustable torque and can be used for mounting and dismounting electrical components with threaded fastening in general engineering products.

A wrench with adjustable torque is known from the prior art (Author's certificate No. 335085, IPC: V25V 23/14, published 04/11/1972), containing a leash pivotally connected to a handle, in which a latch with a calibrated spring is placed, which keeps the leash from turning relative to the handle until a predetermined amount of torque is reached, and a lever with a working head attached to the leash. In this case, the lever consists of a rod equipped with a scale for setting the moments and rigidly attached to the leash, and a telescopic extension extending the working head.

The disadvantages of this device are: the lack of fixation of the torque control mechanism when disassembling threaded joints, the absence of a limiter for the angle of rotation of the handle when assembling threaded joints.

The closest in technical essence and the achieved results to the proposed technical solution is an adjustable torque wrench (Patent RU No. 955587, IPC: V25V 13/00, V25V 23/14, published December 10, 2010), containing a leash pivotally connected to the handle, in which a latch with a calibrated spring is placed, which holds the leash from rotation relative to the handle until a predetermined torque value is reached. In the upper part of the handle, coaxial through grooves are made symmetrically to the longitudinal axis of the cylindrical cavity of the handle, one of the grooves is made through relative to its end surface, and the other is separated from it by a jumper. In this case, the leash is made with a limiter and a groove interacting with the latch, and placed in a cylindrical cavity and grooves of the handle. Moreover, one of the end surfaces of the leash adjacent to the wall of the groove is made curved, and a tared spring is placed between the stop and the rod.

The disadvantage of this tool is its low technology during operation, since when performing fastening of a fastener, a wrench with adjustable torque must be in the fastening position and, conversely, when unscrewing the fastener, in the fastening position.

The technical problem solved by the creation of this utility model is the low-tech operation of the above wrenches with adjustable torque.

The technical result, to which the claimed technical solution is directed, is to create a key with an adjustable torque for electro-radio components, ensuring the manufacturability of assembling and disassembling threaded connections by limiting the torque and angle of rotation of its handle when assembling threaded connections, as well as the possibility of fixing the control mechanism torque when disassembling threaded connections, in any position of the wrench (for example, when turning it 180 ° around the longitudinal axis).

The technical result is achieved by the fact that the wrench with adjustable torque for the electro-radio components contains a leash pivotally connected to the handle, in which a latch with a calibrated spring is placed, which keeps the leash from turning relative to the handle until the specified torque value is reached. The leash is made with a groove in the end surface of the base, interacting with the latch, and placed in the groove of the handle. A tared spring is placed between the stop and the stem. Moreover, it differs from the prototype in that the end surface of the base of the leash is curved, at the base of the leash there is additionally a symmetrical through window of a curved shape in plan that interacts with a latch-stop located in the walls of the handle groove. In this case, the latch interacts with the end surface of the stop and is placed in a cylindrical opening of the handle commensurate with it, located on the same axis with the handle groove connected to it, the groove in the end surface of the base of the leash and the axis pivotally connecting the leash to the handle.

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

FIG. 1 is a general view of a key with adjustable torque for electro-radio components;

FIG. 2 - general view of the handle;

FIG. 3 - general view of the leash;

FIG. 4 - general view of the emphasis;

FIG. 5 - general view of the stock;

FIG. 6 is a general view of a key with adjustable torque for electro-radio components with a torque greater than the limit.

The adjustable torque wrench for electro-radio components contains a handle 1 (Fig. 1, 2, 6) and a torque control mechanism including a leash 2 (Fig. 1, 3, 6) pivotally connected to the handle 1 via an axis 3 (Fig. . 1, 6), the latch 4 interacting with the leash 2 (Fig. 1, 6), the stop 5 (Fig. 1, 4, 6), the calibrated spring 6 (Fig. 1, 6) and the rod 7 (Fig. 1, 5, 6), closed by a lid 8 (Fig. 1, 6).

The handle 1 is made in the form of a monolithic body with a through groove 9 (Fig. 2) of a U-shaped plan in the upper part for placement of a lead 2. In the walls of the groove 9 there are made through cylindrical holes 10, 11 (Fig. 2) with parallel axes to accommodate the axis 3 and the latch-limiter 12, respectively (Fig. 1, 6).

In the middle part of the handle 1, coaxially with the groove 9, a cylindrical cavity 13 is made (Fig. 2) for placement of a stop 5 and a calibrated spring 6 therein.

From above, from the side of the inner surface 14, the cylindrical cavity 13 passes into the cylindrical hole 15 (Fig. 2), connected to the groove 9 of the handle 1. From below, the cylindrical cavity 13 passes into the threaded hole 16 (Fig. 2) to accommodate the rod 7 and the cover 8 (Fig. 1, 6).

The outer surface 17 (Fig. 2) of the lower part of the handle 1 is made in the form of two sections with corrugation for ergonomics of the handle 1 and the key as a whole.

The leash 2 (Fig. 1, 3, 6) is made in the form of a planar part containing the base 18 and the lever 19 with the working head 20 (Fig. 3), symmetrical to the longitudinal axis of the leash 2.

The base 18 has a through cylindrical hole 21 (Fig. 3), commensurate with the through hole 10 in the walls of the groove 9 of the handle 1, interacting with the axis 3.

The end surface 22 of the base 18 of the leash 2 has a curved shape in plan, for example, arcuate, and is made with a symmetrical wedge-shaped groove 23 (Fig. 3).

Between the wedge-shaped groove 23 and the through cylindrical hole 21 in the base 18 there is a symmetrical through hole 24 (Fig. 3, 6) of a curved shape, for example, curved, the width of which is proportional to the diameter of the through hole 11 in the walls of the groove 9 of the handle 1, interacting with the latch-limiter 12. In this case, the window 24, the hole 21 and the wedge-shaped groove 23 are made symmetrically to the longitudinal axis of the leash 2.

The working head 20 (Fig. 3) of the leash 2 is made with a pharynx 25 commensurate with the fastening element (conventionally not shown).

The wedge-shaped groove 23 in the end surface 22 of the base 18 of the leash 2, the axis 3, pivotally connecting the leash 2 with the handle 1, the cylindrical hole 15 and the groove 9 of the handle 1 connected to it are located on the same axis.

The latch 4 (Fig. 1, 6) is made, for example, in the form of a ball, and is placed in a cylindrical hole proportional to it 15. The latch 4 by means of a calibrated spring 6 keeps the leash 2 from turning relative to the handle 1 until the specified torque value is reached.

The stop 5 (Figs. 1, 4, 6) is a cylindrical rod, the diameter commensurate with the cylindrical hole 15 of the handle 1, with an end surface 26 (Fig. 4), interacting with the latch 4, and with a dividing flange 27 (Fig. 4) interacting with the inner surface of the handle 1 and turning into a shank 28 (Fig. 4) with a sphere-shaped end surface 29 (Fig. 4) for adaptability to mounting in a calibrated spring 6. In this case, the end surface 30 (Fig. 4) of the separation flange 27 interacts with end surface tared spring Other 6.

The tared spring 6 (Fig. 1, 6) is made in the form of a compression spring and is placed between the stop 5 and the rod 7, by means of which it is connected with the latch 4 and the handle 1, respectively.

The rod 7 (Fig. 1, 5, 6) is made in the form of an adjusting screw with a threaded part 31 (Fig. 5), placed in the threaded hole 16 of the handle 1. One end surface 32 (Fig. 5) of the rod 7 is made spherical for mounting technology into a calibrated spring 6, and the other with a slot 33 (Fig. 5) for a standard tool. Moreover, the surface 34 (Fig. 5) of the rod 7 interacts with the end surface of the calibrated spring 6, providing the necessary compression force.

Assembling a key with adjustable torque for electrical components is as follows.

In the groove 9 (Fig. 2) of the handle 1, the base 18 of the leash 2 is installed (Fig. 3), combining its through cylindrical hole 21 with the through holes 10 in the walls of the through groove 9 and pivotally connect it to the handle 1 via the axis 3 (Fig. 1 , 6) followed by a check, for example, by core. In this case, the axis 3 can be made in the form of a pin (for example, a pin 2x10 20X13 GOST 3128).

Combining the window 24 of the leash 2 with the through holes 11 in the walls of the groove 9, a latch-stopper 12 is installed (Fig. 1, 6), which can also be made in the form of a pin (for example, a 2x10 20X13 pin GOST 3128), with its subsequent control, for example, by core.

In the cylindrical hole 15 (Fig. 2) of the handle 1, a latch 4 is placed in the form of a ball (for example, ball 3-10 GOST 3722 - 81) with a stop in the wedge-shaped groove 23 of the base 18 of the leash 2 and the end surface 26 of the stop 5 placed in the cylindrical cavity 13 handles 1 (Fig. 1, 6).

Then, a calibrated spring 6 is placed on the shank 28 of the stop 5 (Fig. 1, 6).

The rod 7 is screwed into the threaded hole 16 (Fig. 2) of the handle 1 by the threaded part 31 using a standard tool using the slot 33 (Fig. 5), ensuring that the rod 7 is placed in the calibrated spring 6 and its end face is contacted with the end surface 34 of the rod 7 ( Fig. 1, 6), adjusting the compression of the tared spring 6, and as a consequence, the necessary torque.

After performing the operation to adjust the set torque, the rod 7 is fixed, for example, with a compound (not shown conditionally), followed by installation of the cover 8 in the threaded hole 16 of the handle 1 (Fig. 1, 6).

An example of the use of a key with an adjustable torque for electro-radio components is a key for mounting and dismounting electro-radio components fixed by fasteners with a specific torque.

The composition of this key (Fig. 1-6) includes a handle 1, made in the form of a cylindrical body and a torque control mechanism, consisting of a leash 2, pivotally connected to the handle 1 by means of an axis 3, a latch 4 interacting with it, connected by a stop 5 s calibrated spring 6 in contact with the handle 1 through the rod 7, closed by a cover 8.

When screwing the fastening element of the electro-radio component, for example, in the form of a nut (not shown conventionally), the pharynx 25 of the working head 20 of the lead 2 interacts with the fastening element so that when the handle 1 is rotated, the working head 20 and the fastening element move as a whole, and the working load is calibrated the spring 6 is sufficient to fix the latch 4, located in the wedge-shaped groove 23 of the base 18 of the leash 2.

When the key torque reaches more than the limit (limited), the tared spring 6 is compressed and the retainer 4 protects itself from the wedge-shaped groove 23 of the base 18 of the lead 2, with the clamp 4 moving along the end curved surface 22 of the base 18, while the base 18 of the lead 2 is partially leaves the U-shaped groove 9 of the handle 1, which indicates a torque having a value greater than the limit (Fig. 6).

The movement of the latch 4 along the end curved surface 22 of the base 18 is limited by the contact of the side surface of the window 24 with the latch-limiter 12, which eliminates the possibility of deformation of the tool and protects the user from injury.

When disconnecting the working head 20 with the fastener of the product, the leash 2, pivotally connected to the handle 1, is able to return to its original position by rolling the latch 4 along the curved surface 22 of the base 18, with its subsequent installation in the wedge-shaped groove 23 of the base 18.

When the working head 20 interacts with the fastener in order to unscrew it (for example, a “stuck” nut), when the required load is greater than the working load of the calibrated spring 6, the locking tab 4 also comes out of contact with the wedge-shaped groove 23 of the base 18 of the leash 2 with subsequent movement the latch 4 on the end curved surface 22 of the base 18, and the movement of the base 18 is limited by the contact of the side surface of the window 24 with the latch-limiter 12, while the handle 1 and the working head 20 are moved as a whole, i.e. like a regular wrench.

Thus, the proposed wrench with adjustable torque for electro-radio components allows to ensure the assembly and disassembly of threaded connections by limiting the torque and angle of rotation of its handle when assembling threaded connections, as well as the possibility of fixing the torque control mechanism when disassembling threaded connections, in any position key, for example, when you rotate it 180 ° around the longitudinal axis.

Claims (5)

1. A wrench with adjustable torque for electro-radio components, comprising a leash pivotally connected to the handle, a latch with a calibrated spring, which holds the leash from turning relative to the handle until the specified torque value is reached, while the leash is made with a groove in the end surface of the base interacting with the latch , and placed in the groove of the handle, and a calibrated spring is placed between the stop and the rod, characterized in that the end surface of the base of the leash is made curved, mainly The leash is additionally provided with a symmetrical through window of a curved shape in plan that interacts with a stopper-limiter located in the walls of the handle groove, while the stopper interacts with the end surface of the stop and is placed in proportion to the cylindrical hole of the handle located on the same axis with the groove connected to it handles, with a groove in the end surface of the base of the leash and with an axis pivotally connecting the leash to the handle. 2. A wrench with adjustable torque for electrical components according to claim 1, characterized in that the groove in the end surface of the base of the leash is made wedge-shaped. 3. A wrench with adjustable torque for the electrical components according to claim 1, characterized in that the end surface of the base of the leash is arcuate. 4. A key with adjustable torque for electrical components according to claim 1, characterized in that the symmetrical through window at the base of the leash has an arcuate shape in plan. 5. A wrench with adjustable torque for electrical components according to claim 1, characterized in that the groove in the handle is U-shaped in plan.

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