SU1184659A1 - Percussive mechanism of nut driver - Google Patents

Abstract

IMPACT WIPER MECHANISM, comprising a casing, anvil spindle with working cams, a drive shaft mounted coaxially with the anvil, a hammer fixed on the drive shaft and having profile grooves forming parallel to the axis of the drive shaft, and rollers placed in the grooves movably and periodically interacting with the working cams of the anvil spindle, characterized in that, in order to simplify the design and increase the specific energy indicators, (L grooves Single made V-shaped with the vertex facing towards the periphery 00 4 Od SP;. of

Description

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The invention relates to a mechanized percussion instrument, in particular to wrenches, and can be used to tighten threaded connections in various industries.

The purpose of the invention is to simplify the design and increase the specific energy indicators of the impact mechanism of the wrench.

FIG. 1 shows the impact mechanism of the wrench, a longitudinal section; in fig. 2 shows section A-A in FIG. 1 (at the time of the impact of the rollers with the working spindle cam-anvil); in fig. 3 - the same (at the time of acceleration of the drummer),

The impact mechanism of the wrench includes a housing 1, anvil spindle 2 with a turnkey 3 head on one end and working cams 4 on the other, a drive shaft 5 mounted coaxially on the anvil, a drummer 6 rigidly mounted on the drive shaft 5, the hammer 6. profile V-shaped grooves 7, which form parallel to the axis of the drive shaft. 5, and their tops are facing the periphery of the hammer 6. In the V-shaped slots 7, the rollers 8 are placed with movement, which periodically interact with the working cams 4 of the spindle anvil 2. The V-shaped grooves 7 are made with the same length of the branches and the same slope to the axis of symmetry.

Impact mechanism of the wrench works as follows.

When the drive (not shown) is turned on, the drive shaft 5 begins to rotate together with the hammer 6 and the rollers 8 placed in the grooves of the hammer 7. When the angular speed of the hammer 6 increases, roller 8 moves to the vertices V- shaped grooves 7

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When the drummer reaches the maximum number of revolutions, the rollers 8 reach the tops of the V-shaped grooves 7 and come into contact with the working cams 4 5 spindles of the anvil 3. At this time, the kinetic energy accumulated by the rollers 8 is transmitted to the working cams 4 spindles of the anvil B and further on tightenable threaded connection.

Under the action of the shock pulse, the spindle-anvil 2 together with a nut (not shown) of the tightened threaded joint rotates At some angle caused by the resistance moment in the thread, and the rollers 8 stop, the impactor 6 together with the drive shaft 5 continues to move, each of the branches of the V-shaped grooves incident on the roller acts on the roller 8 and crushes it to the center of the drummer 6 and removes the rollers 8 from engagement with the working cams 4 of the anvil spindle 2. and engagement of the rollers 8 due to the presence of friction striker 6 zatormazhivaets few. After disengagement of the rollers 8, the latter again begin to rotate together with the drummer 6, which, in turn, begins to rotate with an increasing angular velocity. Then the cycle repeats in the described sequence. The impact mechanism is stopped by disabling the drive.

By making the profile grooves V-shaped, the design of the wrench is simplified and the specific energy indicators of the wrench increase, which are due to the fact that, due to the inclination of the branches during the acceleration of the striker, the rollers 8 move to the periphery of the striker with significantly greater acceleration than the striker receives.

Claims (1)

SHOCK WRENCH MECHANISM, comprising a housing, an anvil spindle with working cams placed therein, a drive shaft mounted coaxially with the anvil, a hammer, rigidly mounted on the drive shaft and having profile grooves that form parallel to the axis of the drive shaft, and rollers placed in the grooves with the ability to move and periodically interacting with the working cams of the spindle anvils, characterized in that, in order to simplify the design and increase § specific energy indicators, the grooves of the hammer Nena V-shaped with the vertex facing towards the periphery thereof. SU, 1,184,659 1 . 1184659