RU213227U1 - Device for assembly and disassembly of threaded connections - Google Patents

Abstract

The utility model relates to the field of hand tools and can be used in any industry where threaded parts with a high tightening torque are used, namely for disassembly and assembly operations during the repair and maintenance of equipment. SUBSTANCE: device for assembling and disassembling threaded connections contains a tubular body with a drive handle, a torque amplifier connected by an output shaft to a socket head, and an extension placed in a tubular case, one end is connected to the input shaft of the torque amplifier, and the other end is connected to the drive handle , while the torque amplifier and the end head are located in the fixation unit, and the handles are rigidly attached to the tubular body. The technical result consists in increasing the productivity of assembly and disassembly of threaded connections with a large tightening torque. 3 w.p. f-ly, 1 pr., 1 tab., 22 ill.

Description

The utility model relates to the field of hand tools and can be used in any industry where threaded parts with a high tightening torque are used, namely for disassembly and assembly operations during the repair and maintenance of equipment.

There is a known method of unscrewing nuts by using a set of individual parts, consisting of an end head, which is installed on the unscrewed nut, a multiplier mounted on the end head and a torque wrench, installed on the multiplier (Internet source https://youtu.be/r_ZFNvUqxbw, date of placement information on the Internet - 06/15/2015).

Synonyms for the term "unscrewing" used by specialists in dismantling and assembly operations are the terms "unscrewing", "unscrewing", "unscrewing", "screwing", "pulling", "pulling", "unscrewing". Hereinafter, the term “unscrewing” and its single-root derivatives will be mainly used.

Synonyms for the term "twisting" used by specialists in dismantling and assembly operations are the terms "twisting", "wrapping", "screwing", "screwing", "tightening", "wrapping", "tightening". Here and further in the text, the term "twisting" and its single-root derivatives will be mainly used.

The disadvantage of the above method of unscrewing the nuts is the need to repeat the operation of preparing the set of individual parts for work (the end head is installed on the unscrewed nut, the multiplier is installed on the end head, the torque wrench is installed on the multiplier) before unscrewing the first nut, then after unscrewing the first nut and before unscrewing the second nut it is necessary to remove the set of individual parts from the nut (the torque wrench is removed from the multiplier, the multiplier is removed from the end head, the end head is removed from the unscrewed nut). Unscrewing both the second nut and any subsequent nut is carried out similarly, by preparing the set of individual parts for operation and then removing the set of individual parts from the nut. Thus, the disadvantage of using a set of individual parts is the need for significant effort and time associated with repeating the operation of preparing the set of individual parts for operation and subsequent removal of the set of individual parts from the unscrewed/twisted nut. In addition, if the nuts are low, for example at floor level, then when unscrewing / tightening the nuts, the worker will have to take an uncomfortable position (bending down or squatting, kneeling), with one hand he will have to hold the torque wrench and rotate it around the axis of rotation, and with the other hand, he must hold on to stationary objects or surfaces nearby in order to maintain a stable position (balance) and not fall, while an uncomfortable position creates inconvenience in work, leads to fatigue and reduces the productivity of the worker.

A device is known for creating a tightening torque with an accurate torque for threaded connections (patent for invention No. RU2530182C2, IPC B25B 13/48, B25B 21/00, B25B 23/142, G01L 25/00, publ. 10.10.2014), containing a combination torque booster with a torque wrench matched to it and calibrated with it. The torque wrench is provided with a memory device for recording data characterizing the tightening torque, and the memory device stores the gear ratio of the torque amplifier determined during calibration. The method for calibrating the tightening device includes determining the gear ratio based on at least one average value obtained over the entire torque range.

The disadvantage of the device is the need for significant effort and time associated with the repetition of the operation of preparing the set of individual parts and then removing the set of individual parts from the unscrewed/twisted nut or bolt.

A torque wrench is known (utility model patent RU64365U1, IPC G01L 1/04, G01L 3/00, publ. 06/27/2007), containing a body, a torque indicator with a scale and a pointer, an elastic element, a head and a knob, while the body is made in the form of a pipe, one end of which is connected to the lower end of the elastic element and the socket wrench, and the other end is coaxially connected to the indicator scale, the elastic element is placed with the possibility of torsion deformation inside the pipe, its upper end is connected to the head, which is connected to the indicator pointer, and the scale and the indicator pointer are connected to the pipe and the head with the possibility of rotation relative to each other until the pointer pointer is aligned with the zero mark on the scale.

The advantage of a torque wrench is the presence of a body made in the form of a long pipe, which allows you to unscrew / tighten low-lying nuts.

The disadvantage of a torque wrench is the impossibility of using threaded connections with a large tightening torque during assembly and disassembly, due to insufficient torque developed by this key.

Common essential features are the presence of a tubular body and a drive handle.

Devices for assembling and disassembling threaded connections with a torque amplifier are known (application for utility model CN2106043U, publication date 06/03/1992; utility model patent CN200945596Y, publication date 09/12/2007), the disadvantage of such devices is the need for significant effort and time associated with the repetition of the operation of preparing the set of individual parts for work and the subsequent removal of the set of individual parts from the unscrewed / tightened nut or bolt.

Known wrench for rail fastening (utility model patent RU140693U1, IPC B25B 13/48, E01B 29/29, publ. and the body of the wrench contains an adjustable torque limiter, which has a body with a groove, while the torque limiter is made in the form of a swivel ring with a drive handle fixed on it, installed on the groove of the torque limiter body with the possibility of rotation relative to the torque limiter body, when In this case, nests are made on the surface of the ring for interacting with locking balls installed spring-loaded in the holes of the torque limiter body, the wrench is equipped with a planetary gearbox, the input shaft of which is connected by the wrench body through an adjustable torque limiter with a drive handle, and at the output a working wrench head is installed on the shaft of the planetary gearbox, to fix the wrench relative to the rail, a rotary rail stop is placed on the body of the planetary gearbox, which interacts with the rail head.

The advantages of a wrench for rail fastening are the presence of a body made in the form of a tubular body, which allows you to unscrew / tighten low-lying nuts and an increased torque developed by a planetary gearbox.

The disadvantage of the wrench is the limited scope, due to the standard size of its working wrench (face) head, designed for nuts commonly used on railroad tracks. From the description of the utility model, it is not clear how the wrench is installed on the nut: in detail (the working wrench (face) head is installed on the nut, after which the output shaft of the planetary gearbox is installed on the working wrench (face) head, after which the output shaft of the planetary gearbox is installed on the input shaft of the planetary gearbox). body of the wrench), or the wrench is a one-piece structure, which is completely installed by the working wrench (socket) head on the nut and removed from the nut after unscrewing / tightening. In both cases, the wrench is characterized by disadvantages: if the wrench is installed on the nut in detail, then the disadvantage is the need for significant effort and time associated with repeating the operation of preparing the set of individual parts for work and then removing the set of individual parts from the unscrewed / tightened nut. If the wrench is a one-piece structure, then the disadvantage is that all the parts from which the wrench is assembled have their own seat with various types of fastening (welding, threaded, splint connections, spring-loaded ball, etc.) and when these non-standardized parts out of order (deformation, integrity violation, etc.) for the selection of spare parts with the same seat takes a lot of time, which reduces the performance of assembly and disassembly of threaded connections with a large tightening torque. The disadvantage of the splint connection and the retainer in the form of a spring-loaded ball is the weak fastening resistance under severe operating conditions of the wrench. Also, the wrench is made without protection of the planetary gear, and mechanical action on its body (caused, for example, by falling objects and equipment) may deform the body of the planetary gearbox and cause it to fail.

Also, the surfaces of the nuts can be coated with a protective corrosion-resistant coating against corrosion, and this coating is not always of the minimum thickness, often when forming the coating (for example, by painting the surface), an uneven thick protective corrosion-resistant coating is formed. If the corrosion resistant coating is damaged, the surface of the nut/bolt head will rust. If there is an uneven thick protective corrosion-resistant coating and rust on the surface of the nut, the working nut (end) head cannot be simply installed on the nut, since there is no gap between the faces of the nut and the inner edges of the working nut (end) head, in connection with which it is necessary either: drive a working nut (socket) head onto a nut with a hand impact tool (for example, a sledgehammer, hammer, etc.), or remove a protective corrosion-resistant coating. Both options are characterized by disadvantages. The disadvantage of using a hand-held percussion tool is the complexity of use, since when working it is necessary to use a sledgehammer / hammer, which requires good physical fitness. When a sledgehammer / hammer strikes a working nut (end) head, when placed on a nut of a working nut (end) head, sparks may form, which is unacceptable at hazardous production facilities. The presence of sparks in the working area can lead to an explosive situation, including an increase in gas concentration of more than 20% of the LEL (more than 1% CH ₄ ) in the air of the working area can lead to an explosion. When clogging the working wrench (end) head with a sledgehammer / hammer, the working wrench (end) head can be unevenly mounted on the nut due to vertical uneven force sinking one of the sides of the working wrench (end) head, which leads to the formation of skew and jamming of the working wrench ( end) head on the nut. After unscrewing / tightening the nut, it is necessary to remove the working nut (face) head, and to remove the stuck working nut (face) head, you must also use a hand impact tool (sledgehammer or hammer).

Under production conditions, the removal of an old protective corrosion-resistant coating (for example, paint and varnish) can be carried out by the following methods: mechanical, chemical, sandblasting, hydroabrasive, hydrodynamic and thermal. The mechanical method of removing paintwork from parts is not acceptable due to the low productivity of the method, the significant consumption of expensive cutting tools and the need to dispose of chips contaminated with paintwork material. The chemical method of removing paintwork from parts is also unacceptable due to the low productivity of the method, the significant consumption of chemical reagents (washes), the low environmental friendliness of the method (aerosol emissions into the atmosphere) and the need to dispose of chemical reagents contaminated with paintwork material. The disadvantage of the sandblasting method is the high dust content of the workplace, which exceeds the parameters of sanitary standards. Dust settles on the equipment. Preparation of production is technologically complex, the abrasive must be dried, sieved, well packed. The disadvantage of the hydroabrasive method is the high consumption of water and abrasive for cleaning large areas and filling the workplace with waste water, abrasive and coating removal products. The disadvantage of the hydrodynamic method is the high water consumption per unit surface area, the filling of the workplace with waste water and coating removal products. The thermal method is characterized by heating the painted surface of parts with a flame of gas burners and mechanically removing the remnants of the old coating. The disadvantages of the thermal method are: significant consumption of combustible gases used in burners; significant loss of part metal caused by strong oxidation of the part surface during high-temperature treatment with a gas flame; low environmental friendliness of the method caused by the emission of combustion products of combustible gases, metal vapors and paintwork into the atmosphere. The disadvantage of the thermal method is the presence of open fire in the working area, which can lead to an explosive situation, including an increase in gas concentration of more than 20% of the LEL (more than 1% CH ₄ ) in the air of the working area can lead to an explosion. All of the above methods for removing the old protective corrosion-resistant coating are characterized by disadvantages and are not recommended for use at hazardous production facilities.

The common essential features of the claimed device and the prototype are the presence of a tubular body, a drive handle, a torque amplifier (in the prototype - a planetary gearbox), an end (in the prototype - a working nut) head.

The technical problem of the prior art lies in the fact that the known devices for assembling and disassembling threaded connections are characterized by low productivity, since they are often not connected into a single structure, but are a combination of individual parts: a drive handle, a body, a torque amplifier (multiplier), an end head. The use of a set of individual parts is difficult to use, since significant efforts and time are required associated with repeating the operation of preparing a set of individual parts for work and then removing the set of individual parts from an unscrewed / tightened nut or bolt, which reduces the productivity of the process of assembling and disassembling threaded connections .

Known devices, made in the form of a one-piece design, for which it is not necessary to repeat the operations of preparing the set of individual parts for operation and subsequent removal of the set of individual parts from the unscrewed / tightened nut or bolt, to unscrew the next nut / bolt, are characterized by low assembly-disassembly performance of threaded connections with a large tightening torque, since often the surfaces of the nuts / bolt heads are covered with a protective thick uneven corrosion-resistant coating, and when trying to install the end head of the device for assembling and disassembling threaded connections on the nut / bolt head, difficulties arise due to the inconvenience of gripping the device for assembly and disassembly of threaded connections by hand. Also, when trying to remove the end head of the device for assembling and disassembling threaded connections from the nut/head of the bolt, difficulties arise due to the inconvenience of gripping the device for assembling and disassembling threaded connections. Also, the connection of the end head and the output shaft of the torque amplifier (multiplier) in known devices for assembling and disassembling threaded connections, by means of a retainer - a cotter pin or a spring-loaded ball, is an unreliable connection, as a result of which, when removed from the nut / bolt head, the retainer is deformed and / or ceases to connect the end head and the output shaft of the torque amplifier (multiplier). Spending time to replace the retainer reduces the productivity of the device for assembling and disassembling threaded connections. Lack of protection for the torque booster can result in damage if objects and equipment fall on it. In case of failure of parts of the device for assembling and disassembling threaded connections, it is necessary to replace them, which reduces the productivity of the process of assembling and disassembling threaded connections. Often, all the parts from which the devices known from the prior art for assembling and disassembling threaded connections with a high tightening torque are assembled have their own seat with various types of fastening (welding, threaded, cottered connections, etc.) and when these non-standardized parts out of order (deformation, violation of integrity, etc.) time is required for the selection of spare parts, which reduces the productivity of assembly and disassembly of threaded connections with a large tightening torque.

The technical result achieved when using the device is to increase the productivity of the assembly and disassembly of threaded connections with a large tightening torque.

The technical result is ensured by the fact that the device for assembling and disassembling threaded connections contains a tubular housing with a drive handle, a torque amplifier connected by an output shaft to a socket head, and an extension placed in a tubular housing, connected at one end to the input shaft of the torque amplifier, and the other end - with a drive handle, while the torque amplifier and the end head are located in the fixation unit, and the handles are rigidly attached to the tubular body.

It is expedient to make the fixation unit from forks with lugs attached to the side surface of the tubular body, connected by an axis with the lugs of the enclosing elements, perpendicular to the longitudinal axis of which supporting elements are attached on both sides to their side surfaces with fixing elements fixed on the side/end surface of adjacent supporting elements.

It is recommended that the handles be made tubular and placed horizontally or at an angle to the horizon.

It is advisable to apply a coating on each handle, partially or completely covering the gripped part of the handle, made of rubber or elastomers.

Torque amplifiers (multipliers) are universal devices designed for disassembly and assembly of threaded connections. The principal feature of such devices is that they allow developing large values of the working (output) torque with initially small values of the applied (input) force. A multiple increase in the moment of force occurs due to the planetary gear reducer located inside the torque amplifier, which has a high gear ratio. The force developed depends on the design of the mechanism and the set of gears in the planetary gear reducer. Depending on the type of drive, torque boosters can be: mechanical manual, pneumatically driven, electrically driven. When using a torque booster with a pneumatic drive, with an electric drive, the performance of the device for assembling and disassembling threaded connections increases, but often the organization of power supply and air supply presents significant difficulties. In addition, in case of single repair operations, when it is necessary to overcome significant distances from one place of dismantling and assembly operations to another place, the use of a pneumatically driven torque amplifier with an electric drive is impractical.

The lack of protection of the torque amplifier in analog devices leads to the fact that when objects and equipment fall on the torque amplifier, the torque amplifier may be damaged and it will need to be replaced / repaired, which reduces the performance of assembly and disassembly of threaded connections with a large tightening torque . The enclosing elements protect the torque amplifier from impacts of objects and equipment falling on it and, as a result of increasing the reliability of the claimed device, there is no need to replace/repair the torque amplifier, therefore, the assembly and disassembly performance of threaded connections increases.

The handles placed on the device for assembling and disassembling threaded connections make it possible to direct the end head of the claimed device vertically onto the bolt head/nut, displacing excess uneven protective corrosion-resistant coating from the surface of the bolt head/nut, thus setting the end head on the bolt/nut. nut without distortion. After unscrewing / tightening the bolt / nut, the removal of the claimed device is carried out quickly, since the end head, rigidly fixed with its annular groove in the fixation unit, is removed by lifting the handles of the device for assembling and disassembling threaded connections, thus increasing the productivity of assembling and disassembling threaded connections for due to the fact that there is no need to forcefully remove (through the use of a hand impact tool) a misaligned (stuck) socket from the nut/bolt head. Also, the rigid connection of the annular groove of the end head and the supporting elements of the fixation assembly provides a reliable connection of the claimed device and the end head, allowing the use of the claimed device with high performance due to the absence of the need for repair, as in analog devices, in case of failure of the end head lock (cotter pin or spring loaded ball).

Improving the performance of assembly and disassembly of threaded connections is also carried out due to the quick replacement in the fixing unit of the end head of one size with the end head of another size, as well as a torque amplifier with a torque amplifier with a higher/lower operating (output) torque.

A device for assembling and disassembling threaded connections is illustrated in non-limiting figures of the utility model, where

in fig. 1 shows an isometric view of a device for assembling and disassembling threaded connections in an assembly;

in fig. 2 shows an isometric view of a device for assembling and disassembling threaded connections in a partially disassembled state (without torque booster and end head);

in fig. 3 is an enlarged view of A in FIG. 2;

in fig. 4 shows an isometric view of a locking assembly with locking elements that do not interconnect adjacent supporting elements;

in fig. 5 shows an isometric view of the fixation unit with female elements articulated to the sides for mounting a torque booster and an end head;

in fig. 6 shows an isometric image of a device for assembling and disassembling threaded connections in operation (the end head is mounted on the bolt head);

in fig. 7 shows an isometric image of a device for assembling and disassembling threaded connections in operation (the end head is mounted on a nut);

in fig. 8 illustrates the process of mounting a device for assembling and disassembling threaded connections (mounting the drive handle and torque amplifier);

in fig. 9 is an enlarged view of B of FIG. eight;

in fig. 10 is an enlarged view B of FIG. eight;

In FIG. 11 illustrates the process of mounting a device for assembling and disassembling threaded connections (mounting a face head);

in fig. 12 is an enlarged view of the D of FIG. eleven;

in fig. 13 is an enlarged view D of FIG. eleven;

in fig. 14 illustrates the process of mounting a device for assembling and disassembling threaded connections (the torque amplifier and the end head are located in the fixation unit, but are not fixed by the wrapping and supporting elements);

in fig. 15 is an enlarged view of E in FIG. fourteen;

In FIG. 16 shows an isometric view of a torque booster and an end head placed in the fixing unit, with fixing elements that do not connect adjacent supporting elements;

in fig. 17 shows an isometric view of the torque booster and end head placed in the fixing unit, with fixing elements that connect adjacent supporting elements;

in fig. 18 is a front view of an assembly for assembling and disassembling threaded connections;

in fig. 19 is a section G-G from FIG. eighteen;

In FIG. 20 is a left side view of an assembly for assembling and disassembling threaded connections;

in fig. 21 shows a top view of the device for assembling and disassembling threaded connections in the assembly;

in fig. 22 shows a partial view of the process of assembling the swivel (wrapper, axle, fork with lugs).

Device for assembly and disassembly of threaded connections contains a tubular body 1 (Fig. 1-7, 9, 10, 12, 13, 15-18, 20), made in the form of a long pipe. In order to make the use of the claimed device comfortable, the length of the tubular body 1 is made not exceeding the height of the employee using the claimed device (not shown in the figure). The handles 2 (FIGS. 1, 2, 6, 7, 18, 20, 21) are rigidly attached to the tubular body 1, for example by welding or such mechanical fastening, in which they will be held in place. The number of handles 2 can be any, but it is preferable that there are two handles. Handles 2 are tubular and can be placed horizontally or at an angle to the horizon. Each handle 2 can be coated 3 (Fig. 1, 2, 8, 11, 14, 18, 20, 21), partially or completely covering the gripped part of the handle 2, made, for example, of rubber or elastomers. The cover 3 is mainly used to prevent slipping of the worker's fingers (not shown in the figure) and to improve grip. To the tubular body 1, below its middle part, a tubular stop (not shown in the figure) can be attached horizontally or at an angle to the horizon, for example, by welding or such mechanical fastening, in which it will be held in place, which can be stepped on (not shown in figure). The stop can be covered with a coating (not shown in the figure), partially or completely covering the surface of the stop, made, for example, of rubber or elastomers. The stop cover ensures that the worker's foot does not slip off.

Inside the tubular body 1 there is an extension 4 (Fig. 8-15), made in the form of a rod, to one of the ends of which is attached the drive handle 5 (Fig. 1, 2, 6-9, 11, 12, 14, 18, 20, 21) to apply rotational motion when loosening or tightening nuts 6 (Fig. 7) or bolts 7 (Fig. 6). The end of the extension 4 to which the operating handle 5 is attached, as well as the other end of the extension 4, may have inward concave portions and outwardly convex portions in section, which alternate and repeat in the radial direction around the center point of the end of the extension; and be of any geometric shape, such as a triangle, curvilinear triangle, square, rectangle, parallelogram, rhombus, trapezoid, trapezoid, deltoid, pentagon, hexagon, heptagon, octagon, nonagon, decagon, circle with external projections, ellipse, or oval . The end of the extension 4, to which the drive handle 5 is attached, is intended for connection with the head 8 (Fig. 1, 2, 9, 12, 18, 20) of the drive handle 5, which has the corresponding shape of concave and convex parts. The drive handle 5 can be configured to control the amount of torque (for example, a torque wrench (Fig. 1, 2, 6-9, 11, 12, 14, 18, 20, 21) or without control of the amount of torque (for example, reverse wrench, ratchet, wrench, wrench (not shown in the figure)).If there is a ratchet mechanism (not shown in the figure) in the drive handle 5, adjustable rotation is possible only in the direction of tightening the nut 6 / or in the direction of unscrewing the nut 6. The other end of the extension 4 is connected to the input shaft 9 (Fig. 10) of the torque amplifier 10 (Fig. 1, 6-8, 10, 11, 13-18, 20). The input shaft 9 has the shape of convex and concave parts corresponding to the shape concave and convex parts of the end of the extension cord 4. The torque amplifier 10 is located in the fixation unit (shown in Fig. 1-8, 10, 11, 13-18, 20, but not indicated by positions), and end head 11 (Fig. 1, 6-8, 10, 11, 13-18, 20). contact of the end of the tubular body 1 and the torque booster 10, an annular plate is attached to the end of the tubular body 1 (for example, by welding or such mechanical fastening that it will be held in place). The annular plate at the end of the tubular body 1 is shown in the figures, but is not indicated by the position.

The torque amplifier 10 contains an input shaft 9 connected to the central gear (not shown in the figure), satellite gears (not shown in the figure), a carrier (not shown in the figure) connected to the output shaft 12 (Fig. 10, 13) . On the output shaft 12 of the torque amplifier 10, an end head 11 is installed with the possibility of replacing the end head 11 of one size with the end head 11 of another size, corresponding to the unscrewed / tightened nut 6 / bolt 7. The end head 11 can have an internal hexagonal hole or a hole of any other shape , for example, a dodecahedron corresponding to the external dimensions of the unscrewed / screwed nut 6 / bolt 7.

Forks 13 (Fig. 1-5, 10, 13, 15-17, 20-22) with two lugs 14 (Fig. 22) are attached to the lower part of the tubular body 1 to its side surface (for example, by welding). The number of forks 13 can be any, but not less than three. With the eyes 14 of the fork 13 is connected by the axis 15 (Fig. 22) the end of the wrapping element 16 (Fig. 1-5, 7, 10, 13, 15-20, 22), made in the form of an eye 17 (Fig. 22). As an axis 15, a fastener rod (bolt) can be used. The wrapping element 16 wraps around the torque booster 10, repeating with its contour the outer contour of the torque booster 10. A metal plate can be used as the wrapping element 16. The number of wrapping elements 16 can be any, but not less than three. Preferably, the number of wrapping elements 16 corresponds to the number of forks 13. To the other end of the wrapping element 16, perpendicular to its longitudinal axis, two supporting elements 18 are attached on both sides to its side surfaces (Fig. 1-5, 10, 13, 15-17, 19 ), for example, by welding or mechanical fastening in such a way that they will be held in place. Supporting elements 18 are made, for example, in the form of metal plates in the form of an annular sector, which, for example, in the case of three enclosing elements 16, is approximately 1/7 of the annular plate (shown in the figure, but not marked with positions). Adjacent to the end head 11, the inner cylindrical surface of the annular plate formed by the supporting elements 18 has a shape that repeats the shape of the annular groove (shown in the figure, but not indicated by the position) of the end head 11.

To one of the supporting elements 18 attached to the side surface of the enclosing element 16, a locking element 19 is attached (Fig. 1-5, 10, 13, 15-17, 19), made with the possibility of interconnecting adjacent supporting elements 18, and, respectively, preventing the rotational movement of the eyes 17 of the wrapping elements 16 on the axis 15, protecting the wrapping elements 16 from moving apart from the longitudinal axis of the tubular body 1. The locking element 19 can be mounted pivotally (Fig. 1-5, 10, 13, 15-17 , 19), as the hinge axis can be used the fastener rod - a bolt (shown in the figures, but not indicated by the position), by snapping the protrusion (shown in the figures, but not indicated by the position) placed on the adjacent supporting element 18 in the groove (on figures shown, but not marked) of the locking element 19. The locking element 19 can be fixed on the side/end surface of adjacent supporting elements 18 by means of a threaded connection. A metal plate can be used as the fixing element 19.

Thus, the fixation unit consists of forks 13 with lugs 14, wrapping elements 16, supporting elements 18 and fixing elements 19.

The stop of the end of one supporting element 18 in the end of the adjacent supporting element 18, as well as the stop of the enclosing elements 16 in the body of the torque amplifier 10 prevents the supporting elements 18 of the claimed device from coming off, and in a partially disassembled state (without the torque amplifier 10 and the end head 11 ) the stop of the end of one supporting element 18 in the end of the adjacent supporting element 18 prevents the enclosing elements 16 from coming off.

To fix the device for assembling and disassembling threaded connections relative to fixed assemblies or parts (shown in Fig. 6, 7, but not indicated by position) located next to the nut 6 / bolt 7, which must be screwed / unscrewed onto the body of the torque amplifier 10 a reaction support 20 is installed (Fig. 7), or a reaction support 20 (Fig. 6) is inserted into the body of the torque amplifier 10 (Fig. 6), fixing the torque amplifier 10 (hence, the claimed device) motionless relative to the fixed nodes or parts.

Device for assembly and disassembly of threaded connections works as follows. The enclosing elements 16, pivotally moving around the axis 15, are bred in different directions from the longitudinal axis of the tubular body 1 (Fig. 5), and the torque amplifier 10 is pressed against the end of the tubular body 1 (Fig. 8, 10). The input shaft 9 of the torque amplifier 10 is connected to the corresponding end of the extension 4 (Fig. 11, 13). An end head 11 is installed on the output shaft 12 of the torque amplifier 10 (Fig. 11, 13, 14), after which the enclosing elements 16, pivotally moving around the axis 15, are brought back towards the longitudinal axis of the tubular body 1 (Fig. 15), due to whereby the supporting elements 18 with their ends rest against the end of the adjacent supporting element 18 (Fig. 16). The annular plate formed by the supporting elements 18, with its inner cylindrical surface rests against the annular groove of the end head 11. Adjacent (adjacent to each other) supporting elements 18 are connected to each other by locking elements 19 (Fig. 17). The corresponding end of the extension 4 is connected to the head 8 of the drive handle 5 (Fig. 9, 12). A reaction support 20 is installed on the body of the torque amplifier 10 (Fig. 6, 7).

To loosen/tighten the nuts 6 (as well as the bolts 7), the axis of rotation of which is located vertically, the claimed device with the end head 11 is installed on the nut 6, which must be tightened or unscrewed with a high torque (Fig. 7). In the presence of an uneven thick protective corrosion-resistant coating and rust on the surface of the nut 6, the end head 11, lowering under the weight of the claimed device onto the nut 6, displaces excess protective corrosion-resistant coating and rust from the nut 6. If the end head 11 does not lower itself, then the worker presses on the handles 2 of the claimed device with his hands (not shown in Fig.), or steps on the stop with his foot, and the end head 11 displaces excess protective corrosion-resistant coating and rust from the nut 6 descending on the nut 6. To loosen/tighten the nuts 6 (as well as the bolts 7), the axis of rotation of which is horizontal, the claimed device with the end head 11 is installed on the nut 6, which must be tightened or unscrewed with high torque. If there is an uneven thick protective corrosion-resistant coating and rust on the surface of the nut 6, then the worker presses on the handles 2 of the claimed device with his hands (not shown in the figure), and the end head 11 displaces the excess protective corrosion-resistant coating and rust from the nut 6, setting on nut 6.

To tighten/unscrew the nut 6 using the claimed device, rotate the drive handle 5, applying force to it. The rotation from the drive handle 5, rigidly connected to the extension cord 4, is transmitted to the input shaft 9 of the torque amplifier 10. Rotating, the input shaft 9 with its central gear with the help of satellite gears rotates the carrier and, accordingly, the output shaft 12 with the end shaft installed at its end. head 11. The end head, fixed with its annular groove by the annular plate formed by the supporting elements 18, freely rotates around its axis, scrolling with its annular groove on the protrusion of the inner cylindrical surface of the annular plate. In this case, the working (output) torque of the end head 11 increases several times in comparison with the torque of the drive handle 5.

If the drive handle 5 is made in the form of a torque wrench with a ratchet, then the drive handle 5 is turned clockwise/counterclockwise by reciprocating rotational movements, while the entire claimed device is completely rotated to the right or left side (except for the drive handle 5 and extension cord 4) until it stops reaction support 20 of the torque amplifier 10 into fixed units or parts located next to the nut 6, which must be tightened or unscrewed. The torque amplifier 10 is rotated by the reaction support 20 to the right or left, depending on whether the nut 6 (or bolt 7) is screwed or unscrewed. The reactive moment that occurs when tightening the nut 6 tends to turn the body of the torque amplifier 10 in the direction opposite to the twisting. Fixing the claimed device to prevent rotation around its axis due to the occurrence of a reactive moment is carried out by turning the claimed device and resting the reaction support 20 of the torque amplifier 10 in the fixed units or parts located next to the nut 6, which must be tightened or unscrewed.

When using a torque wrench as a drive handle 5, the tightening torque is controlled by a torque wrench and is calculated according to the tables given in the instructions for the torque amplifier 10, or formulas based on the gear ratios of the torque amplifier 10.

After unscrewing or tightening the nut 6, the claimed device is removed from the nut 6 by lifting the device by the handles 2.

After removing the device for assembling and disassembling threaded connections from nut 6, the device for assembling and disassembling threaded connections is installed on the next nut 6 (bolt 7) and the unscrewing/tightening operation is repeated.

If it is necessary to change the size of the end head 11 for a nut of a larger or smaller diameter or when replacing the torque amplifier 10, the following operations are performed: the reaction support 20 is dismantled, after which the locking elements 19 are disconnected on adjacent (adjacent to each other) supporting elements 18. 16, pivotally moving around the axis 15, they are bred in different directions from the longitudinal axis of the tubular body 1 and the end head 11 and the torque amplifier 10 are removed from the fixation unit. torque to a torque booster with a higher/lower operating (output) torque. After that, the fixation assembly is assembled.

An example of practical implementation.

A device for assembling and disassembling threaded connections was made. A torque booster 10 (multiplier) KING TONY 34486 was installed in the device for assembling and disassembling threaded connections, with a maximum allowable force, input / output: 300 Nm / 1500 Nm, the weight of the torque booster 10 (multiplier) is 7 kg.

To test the performance of the claimed device, we compared three devices for assembling and disassembling threaded connections when unscrewing nuts 6 (the axis of rotation of which is located vertically) on four dust collector covers:

1. The claimed device, nuts - with a thick protective corrosion-resistant uneven coating on the surface;

2. Prototype device, nuts - with a thick protective corrosion-resistant uneven coating on the surface;

3. The device, which is a combination of individual parts (torque booster, torque wrench, end head), nuts - without a thick protective corrosion-resistant uneven coating on the surface;

4. The device, which is a combination of individual parts (torque booster, torque wrench, end head), nuts - with a thick protective corrosion-resistant uneven coating on the surface.

The table shows the results of the time spent, the highest performance of the claimed device, it did not get stuck with the end head 11 on the nuts 6 with a thick protective corrosion-resistant uneven coating on the surface, in case of an accidental fall on the claimed device of a spanner wrench (not shown in the figure) the integrity of the amplifier torque 10 (multiplier) has not been broken. It took from 200 to 400 seconds to remove from the nut 6 (with a thick protective corrosion-resistant uneven coating on the surface) the stuck end heads 11 of the prototype device and the device, which is a combination of individual parts (torque amplifier, torque wrench, end head) .

Table

Nut, No. p./p. Time spent on unscrewing one nut with a large tightening torque (with a thick uneven coating on the surface) of the claimed device, sec Time spent on unscrewing one nut with a large tightening torque (with a thick uneven coating on the surface) by a prototype device, sec Time spent on unscrewing the nut with a large tightening torque (without a thick uneven coating on the surface) by an analogue device, which is a combination of individual parts (torque booster, torque wrench, end head), sec Time spent on unscrewing the nut with a large tightening torque (with a thick uneven coating on the surface) by an analog device, which is a combination of individual parts (torque booster, torque wrench, end head), sec one 40 45 79 322 2 31 327 74 83 3 thirty 333 75 370 four 42 39 70 295 5 thirty 300 75 75 6 43 281 84 82 7 36 34 77 77 eight 45 261 86 267 9 37 38 79 397 ten 34 32 83 394 eleven 31 326 79 285 12 41 306 82 281 13 39 380 77 69 fourteen 35 347 74 284 fifteen 32 390 80 77 16 33 36 80 76 17 38 44 69 72 eighteen 32 31 71 352 19 32 thirty 75 337 twenty 42 314 76 71 21 38 33 68 308 22 44 36 71 328 23 thirty 317 71 376 24 33 45 77 75 25 33 41 85 79 26 42 392 86 74 27 33 369 79 371 28 45 334 84 67 29 45 thirty 88 88 thirty 44 394 83 81 31 36 290 77 83 32 41 322 74 370 33 36 36 69 310 34 34 376 79 312 35 42 45 74 314 36 36 384 78 70 37 34 375 88 287 38 35 35 88 74 39 45 37 69 286 40 34 323 75 357 Total, min 24.7 135.1 51.8 142.9

When using a device for assembling and disassembling threaded connections, a technical result is achieved, which consists in increasing the productivity of assembling and disassembling threaded connections with a large tightening torque.

Claims (4)

1. A device for assembling and disassembling threaded connections, containing a tubular housing with a drive handle, a torque amplifier connected by an output shaft to a socket head, characterized in that the extension placed in the tubular housing is connected at one end to the input shaft of the torque amplifier, and the other end - with a drive handle, while the torque amplifier and the end head are located in the fixation unit, and the handles are rigidly attached to the tubular body. 2. A device for assembling and disassembling threaded connections according to claim 1, characterized in that the fixation unit consists of forks with lugs attached to the side surface of the tubular body, connected by an axis with the lugs of the enclosing elements, perpendicular to the longitudinal axis of which are attached on both sides to their side surfaces supporting elements with locking elements fixed on the side/end surface of adjacent supporting elements. 3. A device for assembling and disassembling threaded connections according to claim 1, characterized in that the handles are tubular and placed horizontally or at an angle to the horizon. 4. A device for assembling and disassembling threaded connections according to claim 3, characterized in that each handle is covered with a coating that partially or completely covers the gripped part of the handle, made of rubber or elastomers.

Images