JPH0447955U

JPH0447955U -

Info

Publication number: JPH0447955U
Application number: JP9100690U
Authority: JP
Priority date: 1990-08-29
Filing date: 1990-08-29
Publication date: 1992-04-23

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例の断面図、第２図
はその工作機械のコラム部の切欠斜視図、第３図
は第１図の−線における外周部分を省略した
断面図、第４図は同じくその排気開閉装置の分解
斜視図、第５図は同じくその排気開閉装置の動作
説明図、第６図は同排気開閉装置における形状記
憶合金の温度−変位特性図、第７図は他の実施例
のモータ部分の断面図、第８図は従来のエアーブ
ロー冷却によるモータ回転数と温度上昇との関係
を示すグラフである。１……コラム、３……スピンドル台、４……ス
ピンドル、５……筒状ハウジング、８……前部ス
ピンドル軸受、９……中間スピンドル軸受、１０
……後部スピンドル軸受、１１……モータ、１２
……ロータ鉄心、１４……ロータ、１５……ステ
ータ、１６，１７……冷却ジヤケツト、１６ａ，
１７ａ……冷却液路、１８……送風装置、１９…
…モータ設置空間、２２……後端排気口、２４…
…冷却風入口、２５……モータ、２６……ロータ
、３０……冷却風排気口、３１……排気開閉装置
、３２……ハウジング、３３……スライダ、３７
……排気孔、３８……形状記憶合金。 Fig. 1 is a sectional view of one embodiment of this invention, Fig. 2 is a cutaway perspective view of the column section of the machine tool, Fig. 3 is a sectional view taken along the - line in Fig. 1 with the outer peripheral portion omitted, and Fig. 4 is a sectional view of an embodiment of the invention. Figure 5 is an exploded perspective view of the exhaust switchgear, Figure 5 is an explanatory diagram of the operation of the exhaust switchgear, Figure 6 is a temperature-displacement characteristic diagram of the shape memory alloy in the exhaust switchgear, and Figure 7 is another diagram. FIG. 8 is a cross-sectional view of the motor portion of the embodiment, and is a graph showing the relationship between motor rotation speed and temperature rise due to conventional air blow cooling. DESCRIPTION OF SYMBOLS 1... Column, 3... Spindle stand, 4... Spindle, 5... Cylindrical housing, 8... Front spindle bearing, 9... Intermediate spindle bearing, 10
... Rear spindle bearing, 11 ... Motor, 12
... Rotor core, 14 ... Rotor, 15 ... Stator, 16, 17 ... Cooling jacket, 16a,
17a...Cooling liquid path, 18...Blower device, 19...
...Motor installation space, 22...Rear end exhaust port, 24...
...Cooling air inlet, 25...Motor, 26...Rotor, 30...Cooling air outlet, 31...Exhaust opening/closing device, 32...Housing, 33...Slider, 37
...Exhaust hole, 38...Shape memory alloy.

Claims

[Scope of utility model registration request]

A motor having a rotor integrated with the spindle is installed in the spindle stand, a blower device is provided for sending cooling air into the installation space of the motor in the spindle stand, and a cooling air exhaust port that opens to the outside from the motor installation space is installed in the spindle stand. A machine tool spindle that is installed adjacent to the upper side of the spindle bearing located on the lower side of the cooling air flow in the motor installation space, and is equipped with an exhaust opening/closing device at the cooling air outlet that opens when the motor is running and closes when the motor is stopped. Base device.