RU1838091C - Impact action nozzle for hand mechanical tool - Google Patents

Description

The invention relates to hand-held mechanized tools and can be used for drilling holes in hard concrete and other building materials.

The purpose of the invention is to increase productivity and improve ix performance.

Fig. 1 shows an impact attachment for manual mechanized strement, longitudinal section; figure 2 section aa in figure 1; Fig. 3 shows a nozzle (arry action at the moment the arnica is in the cocked position; Figures 1G and 4 show the position of the nozzle body when connecting its drive shaft from the output shaft of a hand-held mechanized tool.

The impact nozzle for a hand-held mechanized tool comprises a housing 1, a drive shaft 2 located therein with a shoulder 3 on the outer surface, an axial bore 4 for interacting with the output shaft 5 of the hand-held power tool, and a through hole 6 located perpendicular to its axis, an anvil spindle 7 having a flat end 8, a socket 9 for mounting a drill holder and a shank 10 with a diametral groove 11 at the end mounted in the axial hole 4 of the drive shaft 2 a spring loaded shaft 2 to the anvil 7 gruzhi00 SLE 00

oh oh

with

hammer 12, having a flat end 14 at one end and a diametral groove 15 at the other end, and a hammer 13 moving mechanism, made in the form of beveled cams 16, evenly spaced along the periphery at end face 14 of drummer 13, and chamfered end cams 17 located on the inner surface of the housing 1. On the outer surface of the housing 1 there is a longitudinal blind groove 18. A pin 19 is fixed in the through hole b, the middle part of which and the ends are respectively located in the diametral grooves 11 and 15 of the anvil spindle 7 and impact 13. A stop disk 20 is placed between the spring 12 and the shoulder 3 of the drive shaft 2. Between the ends 8 of the spindle-anvil 7 and the drive shaft 2 there is a fixed compensator 21 in the form of a set of interchangeable rings. A collar 22 is kinematically coupled to the housing 1 and is intended to be fastened to the housing of a hand-held power tool and having a through radial hole 23. In the through radial hole 23, a step 24 is arranged along the length of the pin 24 with a shank 25, which is located in the longitudinal blind groove 18 of the housing 1.

The impact nozzle for a hand-held power tool operates as follows.

The drill bit is brought into contact with the surface to be machined and, with some axial force, the end face 8 of the spindle-anvil 7 is closed with the end face of the drive shaft 2 through the compensator 21, forming a closed power line which is common with the output shaft 5 of the hand-held mechanized tool. In this case, together with the spindle-anvil 7, the hammer 13 moves, additionally pressing the spring 12 and creating a gap between the beveled cams 16 of the hammer 13 and the cams 17 of the housing 1, which excludes their impact during the working stroke of the hammer 13. After turning on the drive of a manual mechanized tool, the rotation of the drive shaft 2 spindle-anvil 7 and hammer 13, spring 14 and thrust disk 22 are transmitted through pin 19 and diametral grooves 11 and 15.

The interaction of the cams 16, 17 leads to the movement of the striker 13 and the compression of the spring 12 by the size of the stroke. When the cams 16.17 collide with each other, the hammer 13 receives acceleration and strikes the anvil 7, which is transmitted to the drill without causing the tool to vibrate. The number of strokes per revolution of the drive shaft 2 is determined by the number of alternately interacting cams 16 and 17.

To change the impact force, the thickness of the compensator 21 is changed, whereby the axial clearance between the cams 16 and 17 is changed under the influence of the initial

efforts and, accordingly, the magnitude of the stroke of the cams 16 and 17.

To remove the nozzle from the output shaft 5 of the hand-held power tool, it is briefly activated without applying axial force. Drummer 13 strikes through the spindle-anvil against the housing 1 at the moment of the stroke, with which the spindle-anvil 7 is in contact. The housing 1 transmits the shock pulse 5 to the drive shaft 2, ensuring its movement relative to the output shaft 5.

The housing 1, together with the drive shaft 2 located therein, comes off the output shaft

0 5, and a shank 25 of a step 24 along the length of the finger 24 holds the housing 1 on the collar 22, preventing the nozzle from completely disconnecting from the hand-held mechanized tool.

5

Claims (2)

SUMMARY OF THE INVENTION 1. Impact nozzle for a hand-held power tool containing a housing housed therein. 0 drive shaft with a shoulder on the outer surface and an axial bore designed to interact with the output shaft of a hand-held power tool, an anvil spindle having 5 flat end, socket for mounting the drill holder on one end and a shank on the other end, located in the axial hole of the drive shaft, kinematically connected to the drive shaft and mounted with the possibility of joint rotation with the latter and relative axial movement of the hammer, spring-loaded towards the anvil and having a flat end face for interacting with a flat end face of the anvil, an axial movement mechanism of the striker and a collar kinematically connected to the housing intended to be fixed on the housing manual mechanized tool, with the exception that in order to increase productivity and improve operational characteristics, the hammer is placed on the drive shaft, the mechanism of axial movement of the hammer is made in the form 5 chamfered cams, evenly spaced on the periphery on the flat end face of the hammer, and chamfered end cams mated on the inner surface of the housing, longitudinal blind made on the outer surface of the housing a groove in the clamp, a through radial hole is made, the kinematic connection of the clamp with the housing is made in the form of a finger stepped along the length of the radial hole, the shank of which is placed in a longitudinal blind groove, and the nozzle is equipped with a fixed compensator placed between the ends of the anvil and the drive shaft in the form of a set interchangeable rings and a thrust disc located between the spring and the shoulder of the drive shaft. 0 2. The nozzle according to claim 1, characterized in that diametrical grooves are made in the shank of the anvil spindle and hammer on the free end side, a through hole perpendicular to its axis is made in the drive shaft, and the kinematic coupling of the anvil and hammer spindle with the drive shaft is made in the form of a pin drive shaft fixed in the through hole, the middle part of which and the ends are respectively placed in the diametrical grooves of the spindle-anvil and hammer. // fЈ / & 2 22 72 Yu #r 2 s Jj years fs / eЈ