SU818851A1 - Percussion-action power nut driver - Google Patents

Description

one; in fig. 5 shows a section of GGD FIG. one; in fig. 6 is a sectional view of DD-D. one.

A percussion impact wrench includes a housing I, in which an inverted motor 2 is installed (Fig. 1), consisting of a fixed rotor 3 and a rotating stator 4. A leading part 5 of the striker, including a cylindrical guide 6 and rigidly connected to it, is rigidly connected to the stator 4 supports 7 and cover 8. The inner surface of the leading part is made in the form of a hexagon 9 (Fig. 4).

In the leading part 5 of the striker, an outer crown part 10 with working chucks, two grooves 12, having an external hexagonal surface for rotation together with the leading part 5 and axial movement relative to it (Fig. 4), as well as the internal crown part 13, is installed, having two protrusions 14 for rotating together with the driven part 10 and axial movement relative thereto.

The anvil 15 is rotatably mounted in the sleeve 16, rigidly connected to the spindle 17, and has working cams 18.

The driven part 10 of the striker has beveled surfaces 19 (FIGS. 1 and 3), and the support 7 has projections 20.

Centrifugal weights 21 in the form of balls are placed between the beveled surfaces 19 and the protrusions 20.

The rotor 3 is located on the axis 22, which is centered in the openings of the housing / and the spindle 17. The leading part of the firing pin is housed in the supports 23 and 24.

In the axial bore 25 of the spindle 17, the inner part 13 of the striker is spring-centered, spring-loaded relative to the anvil 15 by the force spring 26. In the radial holes of the part 10, radially spring-loaded stops 27 are installed, having bevels 28 facing the anvil. udapnika The working cams 18 of the anvil 15 1 have bevels 29 interacting with the bevels of 28 stops 27. The stops 27 have flats on which they are oriented and kept from falling out by ring 30 (Fig. I, 2 and 6) and spring ring 31. Between the driven parts 10 and 13 drummer installed return spring 32.

The impact nutrunner contains a main handle 33 with a trigger 4 and an auxiliary handle 35. On the spindle 17 there is a means 36 for mounting an end head.

Impact wrench works as follows.

On the spindle 17 put on the end head and install it on the threaded connection. After switching on the engine 2, the striker accelerates and the leading part 5 and the driven parts 10 rotate.

and 13. As the rotational speed of the striker increases, the balls 21 move under the action of centrifugal force from the center to the periphery and act on the flattened surfaces 19 of the outer driven part 10 of the striker, moving the latter in the axial direction towards the anvil 15.

When axially moving the outer driven part 10 of the striker, the rotating, internally driven part 13 also moves, compressing the spring 26. In this case, the stops 27 do not allow the working cams of the // hammer to engage with the cams

19 anvils 15 until the bevels of 28 stops 27 are in contact with the bevels 29 working cams 18 of the anvil 15.

As a result of the interaction of the bevels 28 and 29, the stops 27 release the outer driven part 10 of the striker for further towards the anvil 15, at the moment when the working cams 11 of the striker are located opposite the working cams 18 of the anvil and the blow occurs at which the kinetic energy accumulated by the striker , is transmitted through the spindle to the clamped threaded connection.

At the moment of impact, the impactor’s speed drops to zero and the balls 21 return from

the periphery to the center, the spring 32 removes the outer driven part 10 of the striker from the anvil, the working cams // lead from the engagement pin with the working cams 18.

i

Claims (2)

Invention Formula Impact wrench, containing a body, an engine located in it, a drummer with working cams, including a leading part mounted in it with the possibility of axial movement and an external driven part interacting with it the possibility of axial movement of the inner wing part, spring-loaded stops, return and power springs, centrifugal weights placed between the leading and outer driven parts of the striker, and the anvil with counter cams, in order to simplify the design and reduce the axial envelope, the driven part of the firing pin is made with the frontal protrusions facing the engine, the external part of the firing pin is connected with the forces interacting with the projections of the internal driven part, the anvil is made with a blind axial bore, in which the internal part of the impactor is installed by means of bearings, the return spring is placed between the driven parts of the impactor, the force spring is installed between the internal driven part and the anvil, and spring-loaded stops are placed in the inner driven part of the firing pin between the firing pin and the anvil's cams. Sources of information accepted voy5 -Underment during examination: 1. Copyright certificate. USSR № 510905, cl. B 25 B 21/02, 1974. 2. USSR author's certificate No. 504347, cl. B 25 B 21/02, .1974 (prototype). Dl / g /