TW201109544A - Bearing and main shaft mechanism of tool machine using the bearing - Google Patents

Abstract

A bearing comprises electrically conductive rolling balls and non-conductive rolling balls. The main shaft mechanism comprises a rotatable spindle, and the bearing is mounted on the spindle. When the spindle is rotated at high speed and hence static electricity is generated, the static electricity can be directed out and removed by the electrically conductive rolling balls. As such, the main shaft mechanism has no need to be modified, and the static electricity can be removed for increasing processing quality.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool spindle mechanism, and more particularly to a combined structure of a mandrel and a plurality of bearing sets, and a bearing structure used in the above structure. [Prior Art]

The spindle mechanism of a machine tool typically includes a combination of a mandrel and a bearing. The central shaft can rotate to drive the tool and achieve the purpose of processing. The traditional bearing system is equipped with gold and balls, so the static electricity generated by the rotation of the mandrel can be led out and eliminated through the metal ball; however, the metal ball can withstand lower rotation speed, so this The combination of bearings and shafts is not suitable for high speed rotating spindle mechanisms. ^ ^ There is a kind of bearing, which is equipped with ceramic balls to make the bearing can be used. However, the static electricity generated by the high-speed rotating mandrel cannot be exported by the ceramic ball, so it will advance to the workpiece. The discharge is produced, resulting in a flaw in the processing quality. To solve the problem that the mandrel is matched with the bearing of the ceramic ball to reduce the processing quality, and to additionally arrange at the end of the mandrel (away from the direction of the tool) - a conductive hemp or _ conductive slip ring with gold beads, so that the heart can be pulled The generated static electricity is eliminated and eliminated; however, in the existing machine tool structure, the end of the mandrel is not easy to be empty, and the conductive bearing wire is used, so the installation of the conductive bearing * complexity and ίίί, to change the spindle structure of the machine tool The same is difficult and cost [invention content] Zhao, the main purpose is to provide a kind of bearing 'which has a bearing; speed and has the function of eliminating static electricity. - Can be used separately - (10) money supply - a kind of power frequency main mechanism, which is equipped with a shaft 'and a plurality of bearings arranged in the axial direction of the mandrel, and the Na machining end does not eliminate the static electricity generated by the rotation of the mandrel, thereby using 4 beads, Purpose and efficacy, the inner group is provided with a plurality of non-conductive $ 夕-conductive beads [examples (4) magnetic balls and metal balls, or 1 201109544 conductive (four) and non-conductive material balls; so each plus === out, so The other functions and purposes of the tool set at the end of the mandrel and the other examples are further disclosed in the following embodiments. [Embodiment] Referring to FIG. 1 , a spindle machine of a machine tool is disclosed as a column and a body 12 . Axial interior. 'The axial 3 Z linearly active set is set in the sputum of the heart pumping 14 疋 庄 ' ' ' 疋 疋 疋 疋 疋 疋 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心14 can be fascinated. It can be: Ϊ: 2 above Figure 2 3 axis = - a new type of bearing 3 〇, bearing. The shaft ί3 承 and the shaft of the second bearing set have a plurality of through holes 316, and the upper beads are rolled, and the non-conductive balls 36 are 35 = metal roll and inner ring 31 and outer ring Body 32 is in contact. Each of the miscellaneous 35 and 36 can perform high speeds separately. 2 5 of the two bearings:: rpm' so that the mandrel 14 can be electrostatically and conducted to the bearing, and this; borrowing: Yan H14 3 surface will help improve the processing quality. There is no discharge effect between the pieces, and there are % of the scale ball 36 and the number of the conductive balls. The conductive balls 35 are arranged symmetrically. 201109544 Please refer to FIG. 5 in the bearing 30 The non-conductive ball % can be made of a material 362 or adhered to the surface of the bead 364; the same bead is forged or attached as a conductive material 352, the bearing 30 The structure is the same as that of the conventional bearing, so the roll and the bearing set 21 and the second bearing set 22 are arranged at the position H/f of the mandrel 14, and are used for limiting the skill (4). The technical god = this; == back of the invention, therefore, the gamma _ 范 麟 麟 【 domain [simplified description of the schema], 3 diagram is a schematic diagram of the hybrid structure. A further schematic view of the invention of the bearing. . =;:] - structure diagram. 14 mandrel 21 first pumping group 30 bearing 32 outer ring body 34 accommodating hole (1) spindle mechanism 12 body 16 knife mechanism 22 second bearing group 31 inner ring body 33 central ring body 35 conductive ball 201109544 352 conductivity Material 354 beads 36 non-conductive balls 362 non-conductive material 364 beads

Claims (1)

201109544 VII. Patent application scope: 1. A bearing, which is disposed on the main shaft of the machine tool, comprising: a carrier; a plurality of ceramic balls, which are movably assembled in the carrier; and a metal ball that is movable The bearing group is disposed in the carrier, and adjacent to the bearing of the ceramics. 2. claiming the patent range n, wherein the carrier has a body, an outer ring body, and a center ring body is located in the inner ring body. And the plurality of accommodating holes are formed in the central ring body and are through the seventh structure, and each of the ceramic magnetic balls is assembled in each of the accommodating holes and contacts the inner ring body and the third item of the patent range The shaft*, wherein the number of the metal balls is greater than 2 and the position of the arrangement bisects the circumference of the carrier. A bearing is disposed on a spindle of a machine tool and includes: a carrier; a plurality of non-conductive balls movably assembled in the carrier; and a movable ball set in a non-curable ball In the carrier, and adjacent to the bearing of the above-mentioned 5. wherein the non-conductive ball is the bearing described in item 6. == wherein the non-conductive ball is the bearing described in item 7. == The conductive ball is the bearing of the above-mentioned item 1 of the above-mentioned item, wherein the conductive ball is guided by a machine tool spindle mechanism, comprising: a body; a spindle rotatably assembled in the body; The axial-first bearing set is coupled with the 201109544 contact with the mandrel; a second bearing set is disposed at the other end of the mandrel, having a plurality of balls therein and contacting the mandrel; wherein the first bearing set In the second bearing set, at least one of the balls of the bearing set includes non-conductive balls and conductive balls. The machine tool spindle mechanism of claim 9, wherein the non-conductive ball has a non-conductive material on the surface. 11. The machine tool spindle mechanism of claim 9, wherein the non-conductive ball is made of a non-conductive material. 12. The machine tool spindle mechanism of claim 9, wherein the conductive ball has a conductive material on the surface. 13. The machine tool spindle mechanism of claim 9, wherein the conductive ball is made of a conductive material. 14. The machine tool spindle mechanism of claim 9, wherein the conductive ball arrangement is arranged in a symmetrical form.