SU1196251A1 - Rotary percussive-pulsing mechanism for nut drivers - Google Patents

Abstract

A ROTATIVE SHOCK-IMPULSE MECHANISM FOR WIPERS, comprising a housing, a drive shaft housed therein, a hammer connected to it with a striker swiveling around an axis, interacting with the last spindle flange with a fastened cam attached to it and a striker disengaging mechanism from the spindle on the back of the spline, and a hammer on the spindle shaft attached to it. the fact that, in order to increase reliability and durability, the mechanism of the striker output is made in the form of an inertial plate fixed at the striker face, the center of gravity of which is located from the axis of rotation striker at a distance selected from the condition where / 1 is the distance of the center of the plate's body weight to the axis of rotation. F is the distance from the axis of rotation of the striker to the axis of rotation of the striker. A6 Figure 1

Description

The invention relates to a hand-operated mechanized tool with a percussive drive and can be used to assemble and disassemble threaded connections.

The purpose of the invention is to increase reliability and durability due to the implementation of the striker output mechanism in the form of an inertial plate fixed at the end of the striker.

FIG. 1 shows a shock-pulse mechanism, a longitudinal section; in fig. 2 shows section A-A in FIG. 1 (the position of the striker at the moment of acceleration of the drummer); in fig. 3 shows a section BB in FIG. 1 (the position of the inertial plate at the moment of acceleration of the striker); in fig. 4 shows section A-A in FIG. 1 (the position of the striker at the time of a platoon and strike); in fig. 5 is a section BB in FIG. 1 (the position of the inertial plate at the time of arming and hitting); in fig. 6 shows section A-A in FIG. 1 (position of the striker at the moment of rebound of the impactor after the impact); in fig. 7 is a section BB in FIG. 1 (the position of the inertial plate at the moment of rebound of the impactor after the impact); in fig. 8 is a section A-A in FIG. 1 (the position of the striker at the time of its withdrawal from the engagement with the spindle anvil); in fig. 9 shows a section BB in FIG. 1 (the position of the inertial plate at the time of the striker disengagement from the anvil spindle); in fig. 10 shows section A-A in FIG. 1 (the position of the striker at the time of turning it to the neutral position); in fig. And - section BB in FIG. 1 (the position of the inertial plate at the moment of turning the striker to the neutral position); in fig. 12 is a section A-A in FIG. 1 (the position of the striker at the moment when the striker starts to accelerate); in fig. 13 shows a section BB in FIG. 1 (the position of the inertial plate at the moment when the striker starts to accelerate).

The rotary percussion-pulse mechanism for wrenches includes a housing 1, a drive shaft 2 placed in it, a drummer 3 connected to it with a striker 4 pivoting around an axis, interacting with the last anvil spindle 5 with a fastening cam 6 fixed on it and the striking mechanism 4 from engagement with the anvil spindle 5 after the impact, made in the form of an inertial plate 7 fixed at the face of the striker 4, the center of gravity of which is located from the axis of rotation of the striker 4 at a distance selected from the condition / 1/2, where / I is the distance center t gesture inertial plate 7 to the axis of rotation of the striker 4/2 - distance from the axis of rotation of the firing pin 3 to pin 4, the axis of rotation.

Rotational shock-pulse mechanism for nutrunners works as follows.

When actuating drive 1 (not shown) through drive shaft 2, rotation is transmitted to drummer 3. Striker 4 with inertial plate 7 is in neutral position and freely slides with its shock edges along cylindrical surface of anvil spindle 5 (Fig. 2-3). With further rotation of the striker 4 interacts with the platoon cam 6, which turns the striker. 4 around its axis of rotation and engages it with

0 spindle anvil 5 (Fig. 4). In this case, the inertial plate 7 also turns the firing pin 4 towards the engagement side, thereby increasing the contact surfaces of the striker 4 and the spindle anvil 5 (Fig. 5). A shock pulse is transmitted from the hammer 3 to the spindle-anvil 5. When struck, the hammer 3 bounces and turns in the opposite direction, separating the shock surfaces of the striker 4 and the anvil spindle 5 (Fig. 6). After the rebound, the striker 3 rotates again in the same direction, and the inertial plate 7 rotates in the direction opposite to the rotation of the striker 3 (Fig. 9), and brings the striker 4 "3 into engagement with the anvil spindle 5 (Fig. 8). With further rotation of the striker 3, the inner surface of the striker 4 interacts with the anvil spindle 5 (Fig. 10) and sets it to the neutral position (Fig. 11). The cycle of the percussion mechanism is repeated.

Execution of the pullout mechanism from

the engagement in the form of an inertial plate fixed at the end of the striker reduces wear of the interacting surfaces of the striker and the anvil spindle, which increases the reliability and durability of the impact-pulse mechanism for nutrunners.

FIG. 12

FIG. 13

Claims (2)

A ROTARY SHOCK-PULSE MECHANISM FOR WRENCHES, comprising a housing, a drive shaft located therein, a hammer connected to it with a hammer rotating around the axis, an anvil spindle with a screw cam fixed to it, and a mechanism for removing the hammer from engagement with the anvil spindle after impact, the fact that, in order to increase reliability and durability, the striker withdrawal mechanism is made in the form of an inertial plate fixed to the striker end, the center of gravity of which is located from the rotational axis of the striker at a distance selected from the condition h> / 2, where / 1 is the distance of the center of gravity of the plate to the axis of rotation of the striker; / 2 - the distance from the axis of rotation of the striker to the axis of rotation of the striker.