JPS63188726U

JPS63188726U -

Info

Publication number: JPS63188726U
Application number: JP7649387U
Authority: JP
Priority date: 1987-05-21
Filing date: 1987-05-21
Publication date: 1988-12-05

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す断面図、第２
図は従来の一実施例を示す断面図、第３図は従来
の一実施例の溝穴の形状を示す第２図Ｚ―Ｚ′断
面図、第４図はセツトピン穴と回動軸の関係を示
す平面図である。１……旋盤主軸台、２……回動軸、５……セツ
トピン穴、６……セツトピン、７……第１付勢手
段、１０……変換レバー、１１……円筒、１２…
…ロツド、１３……第２付勢手段、１７……溝。 Fig. 1 is a sectional view showing one embodiment of the present invention;
Figure 3 is a sectional view showing a conventional embodiment, Figure 3 is a sectional view taken along Z-Z' in Figure 2 showing the shape of the slot in a conventional embodiment, and Figure 4 is the relationship between the set pin hole and the rotation axis. FIG. DESCRIPTION OF SYMBOLS 1... Lathe headstock, 2... Rotating shaft, 5... Set pin hole, 6... Set pin, 7... First biasing means, 10 ... Conversion lever, 11... Cylinder, 12...
...Rod, 13...Second biasing means, 17...Groove.

Claims

[Scope of Claim for Utility Model Registration] Lever base 3A integrated with rotation shaft 2 provided on lathe head stock 1 to adjust the rotation speed of the lathe main shaft
a set pin 6 housed in a set pin chamber 8 in the lathe headstock 1; a set pin hole 5 having a plurality of spherical recesses provided on the circumference of the rotation shaft 2 on the lathe headstock 1;
A locking device for a conversion lever in which the set pin 6 is fitted and locked by a first biasing means 7 that biases the set pin 6 into the set pin hole 5, comprising: a hollow chamber 9 provided on the side surface of the lever base 3A;
A cylinder 11 having an inner diameter smaller than that of the hollow chamber 9 and having one end screwed onto the lever base 3A so that its central axis coincides with the hollow chamber 9 slides inside the cylinder 11 and the hollow chamber 9. A conversion lever that is inserted into the hollow chamber 9 so as to be locked at both ends of the cylinder 11 has a diameter larger than the inner diameter of the cylinder 11, and the other end is a rod 12 to which a handle 15 with an enlarged diameter is screwed. 10 , and a second urging means 13 housed in the hollow chamber 9 and urging the rod 12 outward, and pressing the rod 12 against the urging force of the second urging means 13. However, when the end of the grip 15 and the end of the cylinder 11 are locked, a hole 5 in the set pin hole 5 with a width larger than the diameter of the set pin 6 is located at a position of the rod 12 in contact with one end of the set pin 6 in the set pin chamber 8. A locking device for a conversion lever characterized in that a groove 17 deeper than the deepest part is provided around the circumference.