Main shaft device of spring pretensioned fine boring head
A spindle device and pre-tightening technology, applied in the direction of the boring head, etc., can solve the problems of poor contact between the bearing outer ring and the bearing ball, increase the difficulty of processing and installation, and inaccurate positioning of the outer ring, so as to achieve good bearing operation and simple structure , Easy to process and produce
Inactive Publication Date: 2011-04-27
DALIAN HUAGEN MACHINERY
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Problems solved by technology
For the main shaft device with this structure, the positioning of the outer rings in the front and rear bearing groups is not accurate after assembly. Due to machining errors or wear after a certain period of operation, the contact between the outer ring of the bearing and the bearing ball will be poor, resulting in over-tightening or over-tightening. loose phenomenon
In order to solve the above problems, some control and compensation devices are installed here, which increases the difficulty of processing and installation, complicates the structure, and increases the cost.
Method used
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[0008] Such as figure 1 As shown: 6 is a box body, in which the main shaft 5 is installed, and the angular contact front bearing group on which the main shaft 5 is installed includes the first bearing 1 and the second bearing 4, between the first bearing 1 and the second bearing 4 A first inner ring 2 is provided for spacing the bearing inner ring of the first bearing 1 and the second bearing 4; a first outer ring 3 is provided between the first bearing 1 and the second bearing 4 for spacing the first bearing 1 And the bearing outer ring of the second bearing 4. The angular contact rear bearing group of the main shaft 5 includes a third bearing 10 and a fourth bearing 13, and a second inner ring 12 is arranged between the third bearing 10 and the fourth bearing 13 for spacing the third bearing 10 and the fourth bearing. The bearing inner ring of the bearing 13; the second outer ring 11 is provided between the third bearing 10 and the fourth bearing 13 for spacing the bearing ...
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The invention discloses a main shaft device of a spring preloaded fine boring head, comprising a box body, wherein a main shaft is arranged in the box body through an angular contact type front / back bearing group; a spacer bush which spaces bearing outer rings is sheathed outside the main shaft between the bearing outer rings of the front / back bearing group; a backing ring is also sheathed outside the main shaft between the bearing outer rings of the front / back bearing group; springs for resisting are circumferentially and evenly distributed between the spacer bush and the backing ring; and a gap is formed between the spacer bush and the backing ring. The main shaft device can keep the favorable contact between the angular contact type bearing outer rings and the bearing balls and ensure the favorable running of the bearings, has simple structure and low cost, is easy for machining, manufacturing and adjustment and good for installation and improves the machining precision of the boring.
Description
technical field [0001] The invention relates to a spring preloaded fine boring head spindle device. Background technique [0002] The existing fine boring head spindle device includes a box body, in which the main shaft is installed through the angular contact front and rear bearing groups, and a spacer ring is set on the outside of the main shaft between the front and rear bearing groups, and the spacer ring is used to separate the front and rear bearing groups. The bearing outer ring in the rear bearing group acts as an axial limit to the bearing outer ring. For the main shaft device with this structure, the positioning of the outer rings in the front and rear bearing groups is not accurate after assembly. Due to machining errors or wear after a certain period of operation, the contact between the outer ring of the bearing and the bearing ball will be poor, resulting in over-tightening or over-tightening. loose phenomenon. In order to solve the above problems, some contr...
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Inventor 杨曙光李瑾
Owner DALIAN HUAGEN MACHINERY