JPS62174151U

JPS62174151U -

Info

Publication number: JPS62174151U
Application number: JP6344186U
Authority: JP
Priority date: 1986-04-25
Filing date: 1986-04-25
Publication date: 1987-11-05

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例で電気ドリルの変速
部の縦断側面図、第２図は第１図のクラツチデイ
スクの係合がはずれた状態の縦断側面図、第３図
はクラツチデイスク、高速、低速両ギヤとの関係
を示す斜視図、第４図はギヤに穿設された嵌合穴
の拡大縦断側面図、第５図はクラツチデイスクに
形成されているラチエツト部の拡大縦断側面図、
また第６図に従来技術の一実施例を示す変速部の
縦断側面図を示す。図において２はギヤカバ、３はインナカバ、４
はスピンドル、８は低速側ギヤ、９は高速側ギヤ
、１０はシフトレバ、１１はシフトロツド、１９
は低速側ピニオン、２０は高速側ピニオン、２１
はフアーストギヤ、２３はアマチユアピニオン、
２５，２８はスプリング、２６はクラツチデイス
クである。 Fig. 1 is a longitudinal sectional side view of the transmission part of an electric drill according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional side view of the clutch disc shown in Fig. 1 in a disengaged state, and Fig. 3 is a longitudinal sectional side view of the clutch disc of the present invention. A perspective view showing the relationship between high-speed and low-speed gears, Figure 4 is an enlarged vertical side view of the fitting hole drilled in the gear, and Figure 5 is an enlarged vertical side view of the ratchet part formed in the clutch disk. ,
Further, FIG. 6 shows a longitudinal cross-sectional side view of a transmission section showing an embodiment of the prior art. In the figure, 2 is the gear cover, 3 is the inner cover, and 4 is the gear cover.
is the spindle, 8 is the low-speed gear, 9 is the high-speed gear, 10 is the shift lever, 11 is the shift rod, 19
is the low speed side pinion, 20 is the high speed side pinion, 21
is first gear, 23 is amateur pinion,
25 and 28 are springs, and 26 is a clutch disk.

Claims

[Scope of utility model registration request]

An electric tool that transmits the power of a motor to a tip tool through a gear mechanism to perform various operations, and the gear mechanism includes an armature pinion provided on an armature shaft, a first gear that meshes with the armature pinion, and an intermediate to which the first gear is fixed. It consists of high-speed and low-speed pinions provided on the shaft, and high-speed and low-speed gears provided on the spindle shaft that mesh with the high-speed and low-speed pinions. In the device having a switching mechanism that can arbitrarily select a gear train, the high-speed side and low-speed side pinions provided on the intermediate shaft are always meshed with the high-speed side and low-speed side gears provided on the spindle. configured,
The high-speed side and low-speed side gears are loosely fitted onto splines provided on the spindle so as to be rotatable and slidable in the axial direction, and between the two gears are at least two gears fitted on the splines of the spindle and on both sides. A disc-shaped clutch member having three or more ratchet-shaped protrusions is disposed, and the surfaces of the high-speed gear and the low-speed gear facing the clutch member are provided with the number of protrusions that fit into the protrusions of the clutch member. The power transmission path switching member is locked to a gear case, and an eccentric pin is provided on the shaft portion of the power transmission path switching member provided perpendicularly to the spindle, The eccentric pin fits into a locking groove provided on the outer circumferential surface of the clutch member to lock the clutch member from moving in the axial direction, and further faces the clutch members of the high-speed gear and the low-speed gear. A coil spring inserted into the spindle is brought into contact with each side of the power transmission path switching member, and the shaft portion of the power transmission path switching member is attached to each side of the high-speed gear and the low-speed gear that are opposed to each other. By rotating the power transmission path switching member, the fitting between the protrusion of the clutch member and the fitting holes of the high-speed side gear and the low-speed side gear is switched. A power tool transmission mechanism configured to select a gear train on the low speed side.