SU988538A1 - Impact power nut driver - Google Patents

Description

(54) IMPACT WIPER

one

 This invention relates to mechanization. tools for assembling and disassembling threaded connections and can be used for assembly and installation work in any industry.

A percussion wrench is known, comprising a casing / -installed engine, a hollow drummer housed in the casing with core grooves on the inner surface, a spindle, an anvil with working cams at one end and a turn-key head at the other, connected to the output shaft of the engine. at the ends there are radial grooves and rollers placed in them, interacting with the profile grooves of the drummer.

The disadvantage of this wrench is that it belongs to the class of high-frequency wrenches, in which the blows follow after turning the hammer at a certain angle, for example To or 2C, and there is no impact control device in it. Using high frequency wrenches, it is difficult to increase their energy-power characteristics (for example, single impact energy) without increasing the power of the drive motor, which leads to an increase in the total mass of the wrench. Since the design of the wrench is not sought. The possibility of

blunt punches, such a wrench has a low durability.

The closest in technical essence to the invention is an impact wrench comprising a body,

10 an engine mounted on it, an anvil spindle housed with working cams at one end and a turnkey head at the other, an integral drummer, one part of which is made in the form of a glass with internal profile grooves and connected to the output shaft of the engine installed in this part of the drummer with the possibility of joint rotation

20 and relative axial movement and spring-loaded with respect to the spindle anvil intermediate element with counter working cams, a separator with radial inclined

25 grooves placed in the profile grooves of the glass rollers with conical ends, interacting with the intermediate element and inclined slots of the separator and device

30 axial movement of intermediate

element and control punch. The device for the axial movement of the intermediate element and the control of the gear) OM is made in the form of an additional spring-loaded driving coupling half with conical sockets in which additional rollers 2j are placed.

The disadvantage of the known wrench is that it has a complex structure, and in the process of acceleration of the impactor, the rollers located in the conical seats of the drive coupling half are held in it due to the forces of friction, which leads to instability of its single impact.

The purpose of the invention is to simplify the design and increase the reliability of the wrench.

The goal is achieved by the fact that in a shock nut wrench, comprising a housing, an engine mounted on it, placed in an 1S1indel-anvil housing with working cams at one end and a turnkey head on the other, a composite drummer, one part of which is made in the form of a cup with internal profiled grooves and connected with the output shaft of the engine, mounted in this part of the hammer with the possibility of joint rotation and relative axial movement and spring-loaded with respect to the spindle - anvil, intermediate a leaf with counter-working cams, a separator with radial inclined grooves, rollers with conical ends interacting with an intermediate element and inclined separator slots, and an axial displacement of the intermediate element and impact control, the housing is made of two halves, spring-loaded one relative to the other in the axial direction, and the device for the axial movement of the intermediate element and the impact control is made in the form of a central roller fixed o in the anvil spindle from the side of the working cams and having control cams at the end, and control cams located on the end of the separator from the side of the radial inclined grooves and interacting with. control cams of the central roller.

Figure 1 shows the impact gaykoert, a longitudinal section; in Fig.2, the incision A-A in Fig.1; on fig.z cutback bb in figure 1; in fig. 4 is a cut-off of BB in FIG.

Impact wrench contains co-body 1, made of two halves 2 and 3, spring-loaded bottom relative to the other in axial

spring 4, engine 5 mounted on housing 1 with output shaft 6, spindle anvil 7 placed in half 3 of body 1 with working cams 8 and centrifugal roller 9 at one end, and turnkey HEAD 10 at the other, placed in half 2 housing 1, the composite drummer 11, one part of which is connected with the output shaft b of the motor 5, is the leading part 12, the size (given in it with the possibility of simultaneous rotation and relative axial movement of the intermediate element 13 with working cams 14,

5 reed cams 8 spindle anvils 7 and a spindle which is spring-loaded relative to the spindle 7 anvil 7 by a spring 15, a separator 16 mounted with the possibility of rotation, and rollers 17

Q with tapered ends 18.

At the end of the central roller 9, control cams 19 are provided, oriented in the same way as the working cams 8 of the spindle anvil 7.

The leading part 12 of the striker 11 is made in the form of a glass with a multi-faceted hole 20, from the end face passing into a circular hole 21, having on a cylindrical surface profile grooves 22 with which the rollers 17 interact, an annular groove 23 at the end.

The intermediate element 13 is made in the form of a hollow polyhedron, the answer5 to the polyhedral hole 20

the leading part 12 of the striker 11 with a conical surface 24, made at the end opposite the end, having working cams 14, which

0 it interacts with tapered butt ends 18 rollers 17.

The separator 16 is made in the form of a disk with an annular groove 25 on one end, control cams 26

5 and two slots 27 with an inclined base. vanilla — surface 28 at the other end. The control cams 26 of the separator 16 interact with the control cams 19 of the central roller 9 of the spindle anvil 7 and are oriented relative to the slots 27 so that their axes are mutually perpendicular.

In the annular grooves 23 and 25 of the leading part 12 of the striker 11 and the separator 16, respectively, placed the balls 29.

Impact wrench works as follows.

 . The drummer 11 receives rotation in one direction or another from the output shaft 6 of the drive engine 5. Together with the driving part 12 of the drummer 11, an intermediate element rotates

5 13 located in a multi-faceted

the aperture 20, the rollers 17 placed in the profile grooves 22 of the leading part 12, which carry the separator 16 along, as their ends fit into the slots 27,

Upon reaching the output shaft 6 of the drive motor 5 of nominal speed (at the end of the rotation process of the drummer 11), the operator presses a handle (not shown) located on the side of the drive motor 5, and pulls together the halves 2 and 3 of the housing 1. This engages the control cams 26 of the separator with the control cams 19 of the central roller 9, as a result of which the separator 16 brakes sharply, and the leading part 12 of the striker 11, continuing its rotation, squeezes the rollers 17 from the profile grooves 22 to the center of the separator. Moving to the center of the separator 16, the rollers 17 with conical ends 18 begin to interact from one side with the inclined surface 28 of the grooves 27 of the separator 16, and the other with the conical surface 24 of the intermediate element 13, with the result that the intermediate element 13 begins to move in the axial direction towards anvil spindle 7. At the initial moment of the axial movement of the intermediate element 13, its working cams 14 are located in front of and above the working c-claws 8 of the anvil spindle 7, which is caused by the orientation of the controllers lugs 19 and 26 of the central roller 9 and the separator 16, respectively, relative to the working cams 8 and 14 of the spindle anvil 7 and the intermediate element 13, respectively, and due to the initial gaps between these cams. Moreover, the gap between the control cams 19 and 26 is somewhat smaller than the gap between the working cams 8 and 14. With the further axial movement of the intermediate element 13, its working cams 14 end up with the working cams 8 and the anvil spindle 7. With the further rotation of the hammer 1I the workers the cams 14 of the intermediate element 13 slide off the working cams 8 of the anvils of the anvil 7 and during the rotation of the striker 11 at an angle corresponding to the gap between the working cams 8 and 14 move axially in the axial direction to the full height laziness and applied shot by an operating cam 8 -nakovalni spindle 7 which transmits the kinetic energy of impact on the tightening rezbvoe compound.

After the transfer of the impact energy to the tightened threaded connection, the operator removes the pressing force from

handles. Then, under the influence of the spring 4, the halves 2 and 3 of the housing 1 are returned to their original position, the control cams 19 and 26 of the central roller are disengaged

9 and the separator 16, under the action of the spring 15, the intermediate element 13 occupies the initial position in the leading part 12 of the striker 11, and simultaneously moves the rollers 17, which

o are included in the profile grooves 22 of the leading part 12 of the striker and the groove 27 of the separator 16.

The cycle of operation is then repeated in the sequence indicated.

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Due to the implementation of the case of

two halves, axially spring-loaded relative to each other, and making axial displacement devices of the intermediate element iMent and impact control in the form of

a central roller having control cams at the end and fixed in the anvil spindle and control cams located at the end

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separator, simplifies the design of the proposed wrench and increases its reliability.

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Claims (2)

1. US Patent 3,734,205. 19-73. 2. USSR author's certificate in application 2988243 / 25-28, cl. B 25 B 21/02, 1980 (prototype). five 12 and 8-8: P