DE1929390U - ANGLE GRINDER. - Google Patents

Description

The! Increase in price concerns a motor-driven angle grinder with an angular gear with pinion,! Ring gear and drive spindle. Winlcel grinder, especially when it comes to electric hand tools with - " _: lower power, can be overloaded and brought to a standstill by pressing the grinding wheel too hard on the grinding surface. to burn through the winding ..-. -:

To avoid overloading and destroying the Device --- improper operation causes the furnace to see now before that in the angle gear of the angle grinder between the crown wheel '' "" and the drive spindle Slipping clutch is installed. If the grinding wheel is now brought to a standstill with the engine running>

. '■ - ■■ - ■.'. -: 2 -

so the heating occurs in the slip clutch to:. ■: _ the engine "is maintained, the device is not decomposed,"'■"

The effort for the slip clutch can especially: be kept small, - if the ring gear forms a coupling part and has a friction surface. The clutch disc, which is located on the crown wheel, is firmly connected to the drive ".." .spindle .. This also results in a- .. short overall length and a small number of cables. On the:. \ arranged on the clutch disc. ^: . Under certain circumstances, a disc spring is sufficient, ¹ where "the door tension of the springs _{can be varied by the size 5.} Material, thickness and number". Ss can -also- ... at the same time disc spring ederii yers chi edener- diameter- 'can be used. -. "..". . '- :; '' ^■;:'_' / '

With the same pitch of the springs ¹ , the V friction torque between the "two clutch parts should remain as constant as possible. With smooth friction surfaces, the" occurring when the clutch slips. Abrasion -nothing / to be removed,. thus the .between the; Friction Surface Remaining ^ AbrasionL; the coefficient of friction and thus the moment of friction / 'In addition, the abrasion leads to pressing; -

and lead to increased wear and tear. --- with always constant. Maximum transmission moment: da- ■. by achieving that one of the friction surfaces --..-.-. "■. is provided with grooves _? which are, for example, arranged concentrically .. With appropriate surface hardening ■■ .'- the wear is reduced. almost to .Ifull - '-: ■' .. and the friction torque remains constant ₉ because the abrasion is carried away in V di.e depressions - the grooves and, the ■■ -'_..-. Friction surfaces always remain clean. It is special. - : "/ -" .- "-""expediently, the clutch disc on its the -eiler- ^. "■■ to exceed....." entstehenden.kreisringförmigen ... grooves friction surfaces 1, ₅ mm 5- not ■■: rad facing end face -with the grooves to provide _5> where the maximum width defined by the 'loop "-.-"" ^: '..-

It is desirable ,: einzu- the transmittable moment of friction ■ ■ - "_ set, then as a stop zwecfcmässig ^eine.Mutter: arranged on the drive spindle aufsehraub- 'V' is -bar and with which the Jederweg the lellerÄern; can be set. _;; - ^.; .. ^: ...

? other features of the. Invention emerge from. the . Under the test and the following description of two: "Embodiments shown in the drawing » \ - "; .- ■,

Ed. 1 - a longitudinal section through one.

. - - ..- ".- - part of a ¥ inkelsehleif eis " - ,. - ■■ _.-. ! ig = 2 a section of the cut

.according to 5 ¹ Ig. Partly with changed-. " - ' Ratscnkupplung.,:. J, .- ■ -, ■ -" ■ "_

The angle able if it is driven by cn. an electric. motor "1 j on the drive shaft 2, a pinion 3.sitzt ^.::.... In a housing 4 is senkrecnt to the driving shaft ^ - einey drive spindle 5 iit) he a slide bearing 6 and an in - a Ewischenteil 7 held .. Rolling - 8; stored _s ;.;. ^: - which receives a grinding tool 9 at its free end = ^ - ^ For this purpose there is an abutment on the drive spindle 5. ^: 10 '.

. aufgeschrauTDtj against: that the grinding wheel .9 with-. by means of a clamping disk 11 can be easily, interchangeably pressed on ^. . . . ".. ^■: ■■ '. J ^_: ■' -. ■ '.'- ■■" ■■ "-""-"'"

On the drive spindle 5 there is now loosely an I-elier wheel '12, into which the belt 3 is integrated. G egen e ine - friction ^{surface: z} 13) _s 14.gelegt a ICupplungsscheibe with the.. dei ⁵ .Antriebsspindel 5 fixed Terbunden _s is, for example, the end-a 1.5 x the drive spindle. 5 designed as a splined shaft SeIn ₅ .-. so that in the radial direction there is a fixed: anchoring; .; ^: - -given is »For the constant promotion of the / face-16

of the clutch disk 1.4 against the friction surface 13 djls -. --- _:. The ring gear 12 is a package of plate springs 17 '.- ■ -. _::: "" Provided that at a stop "18 on the _; .. spindle" drive supported 5. In the embodiment -....: after 3 ig 1 is the stop 18 as a backup ring in the 19s.?.. - Embodiment according to Hg, 2 designed as a nut -20.. »The gate tension of the. Springs. Is decisive;. For the transferable friction torque, - With the nut 20, this gate tension can be adjusted, so that an adjustment is possible depending on the material and grinding wheel.

On the front face 1.6. of the clutch disk 14 ^: are. : .V. \ concentric grooves 21 introduced , which may. lead frictional torque. "■■ - ■: -.: \. ^:: - .. ... -. -

If the grinding wheel 9 is too. strongly towards that: edit-. end workpiece pressed on _S:. so it finally stops: with the drive spindle 5 . Since the lellerrad freely rotatably supported on the Antriebs.spindel .5 ^. _{12: s} is "■" ■ "■ this may be the gear 3 of the electric motor, it Λ 'continue to rotate driven", that ₉ of the coupling part.. "Crown" slips through the winding of the motor 1 does not burn through the through the divider springs ^1.7; a -;:...., asked, maximum transferable Reibm.oment _^is:; of:..,: ■ '- maximum engine power adapted so that the squint disk 9 as a result of _: der_Belastung only then "stops / remains when the highest permissible load of the.Motor 'has just been reached.,:

Claims (9)

Protection claims; "Motor-driven angle grinder with an angle gear With. Pinion, I ell err ad and drive / spindle, characterized in that ^ between iDelXerrad (12) and drive spindle (5) a slip clutch is built in. -. "-" ..-... _ ■ ;. _. \. 2. Angle grinder according to ^^ claim 1, characterized marked · net that the crown wheel. (12) a coupling part, forms, and is provided with a friction surface (. 13). : / 3. Angle grinder according to claim; 1 and..2, characterized in that the pulley wheel (12). on the ... An ... drive spindle (5) rotatably mounted and one against the friction surface (13) of the ring gear (IS) ^; .. / legend. Clutch disc (14) with the drive spin; - "■ del (5) is firmly connected in the radial direction. ■.". 4. Wink el s chi e If ^ 'er according to claim 3, thereby marked-v ^:. ■ "■ .- ■. Shows that the drive spindle (5) ... at its one. End (15) to take ^{1 of} the Iüipplungspheibe -" -..- (14) as. Yiel spline. trained, is ..,,, ' _: -; _: '■ "-. ;; 5 .. angle grinder according to claim. 5, characterized in that the clutch disc (14) on its end face (Ϊ 6 ") facing the ring gear (12)
is provided with grooves (21). \:. ■ - ". ■ _. 6. Angle grinder according to claim 5? thereby 'identified. draws j that the maid-inale width of the; by ν die. circumferential grooves (21). resulting circular ring—,
shaped row surface- 1.5 "is now.""- ■ · .-. 7. Angle grinder according to claim 1 to 4V, characterized in that- on the; Drive spindle (5)
a package of dividing springs (17) between one
Stop (18) and the coupling shard: (14) is arranged- '■ ". Is arranged. Λ. ■ .-; -.. ■..; - ■ .---," ■. ■> ._ 8. Angle grinder according to claim 7? draws; that; as a stop (18) a backup. ;: ring (19) is provided. -. ■; ; / .- ■ -: - ■ - 9 .. angle grinder according to claim 7 ₅ characterized gekenh -; "- is characterized in that as a stop (18) a nut (-20) -. Is arranged; which on the drive spindle (5)
for setting the. Contact pressure can be screwed on,