CN202910719U

CN202910719U - Grinding wheel spindle structure of numerical control centerless grinding machine of valve rod portion

Info

Publication number: CN202910719U
Application number: CN201220411303.9U
Authority: CN
Inventors: 游启龙
Original assignee: WUXI JIANHE NUMERICAL CONTROL MACHINE TOOL CO Ltd
Current assignee: WUXI JIANHE NUMERICAL CONTROL MACHINE TOOL CO Ltd
Priority date: 2012-08-20
Filing date: 2012-08-20
Publication date: 2013-05-01
Anticipated expiration: 2022-08-20

Abstract

The utility model provides a grinding wheel spindle structure of a numerical control centerless grinding machine of a valve rod portion. The grinding wheel spindle structure comprises a spindle, a spindle casing and a grinding wheel chuck plate, the grinding wheel chuck plate is sleeved at the end of the spindle, and the spindle penetrates through the spindle casing. The grinding wheel spindle structure is characterized in that a five-piece hydrodynamic bearing is arranged at two ends of the spindle casing, the spindle penetrates through an inner hole of the five-piece hydrodynamic bearing, an oil channel is mounted in the spindle casing, the oil channel is communicated with inner oil chambers of the five-piece hydrodynamic bearing, the inner oil chambers are uniformly distributed at inner edge walls of the inner hole of the five-piece hydrodynamic bearing, and the inner oil chambers wrap the outer edge surface of the spindle. By means of the grinding wheel spindle structure of the numerical control centerless grinding machine of the valve rod portion, the spindle is not required to be contacted with the bearing when rotated, the starting torque is small, the power consumption is small, and thereby the rotation precision of the spindle is high.

Description

A kind of grinding wheel main shaft structure of engine valve stem numerical control centerless grinder

Technical field

The utility model relates to the structure field of centerless grinder, is specially a kind of grinding wheel main shaft structure of engine valve stem numerical control centerless grinder.

Background technology

Its bearing by two ends of the grinding wheel spindle of existing engine valve stem numerical control centerless grinder directly is loaded in the housing, its main shaft needs when rotating and bearing contacts, starting torque is large, consumed power is large, and because the metal of main shaft and bearing is in contact with one another, causes the rotating accuracy of its main shaft low.

Summary of the invention

For the problems referred to above, the utility model provides a kind of grinding wheel main shaft structure of engine valve stem numerical control centerless grinder, and it is so that main shaft need not with the bearing starting torque that contacts littlely when rotating, and consumed power is little, and then so that the rotating accuracy of main shaft is high.

A kind of grinding wheel main shaft structure of engine valve stem numerical control centerless grinder, its technical scheme is such: it comprises main shaft, the main shaft shell, grinding wheel chuck, the end of described main shaft is set with grinding wheel chuck, described main shaft runs through described main shaft shell, it is characterized in that: the two ends of described main shaft shell are provided with five chip hydrodynamic bearings, described main shaft runs through the endoporus of described moving five chip hydrodynamic bearings, have oil circuit in the described main shaft shell, described oil circuit is communicated with the inside oil pocket of described five chip hydrodynamic bearings, described inner oil pocket is distributed in the Inner edge wall of the endoporus of described five chip hydrodynamic bearings, and described inner oil pocket wraps up described main shaft outer edge surface.

After adopting structure of the present utility model, main shaft has pressure oil with the endoporus central authorities of main shaft rest at five chip hydrodynamic bearings when not turning, during starting without Metal Contact, starting torque is little, consumed power is little, and behind the spindle operation, the oil pressure in the inner oil pocket raises again, form an additional dynamic pressure, improved the rotating accuracy of oil film rigidity and main shaft.

Description of drawings

Fig. 1 is front view structural representation of the present utility model;

Fig. 2 is that the A-A of Fig. 1 cuts open structural representation.

The specific embodiment

See Fig. 1, Fig. 2, it comprises main shaft 1, main shaft shell 2, grinding wheel chuck 3, the end of main shaft 1 is set with grinding wheel chuck 3, main shaft 1 runs through main shaft shell 2, the two ends of main shaft shell 2 are provided with five chip hydrodynamic bearings 4, main shaft 1 runs through the endoporus 5 of moving five chip hydrodynamic bearings 4, have oil circuit 6 in the main shaft shell 2, oil circuit 6 is communicated with the inside oil pocket of five chip hydrodynamic bearings 5, inner oil pocket is distributed in the Inner edge wall of the endoporus 5 of five chip hydrodynamic bearings 4, inner oil pocket parcel main shaft 1 outer edge surface.Emery wheel 7 is set in grinding wheel chuck 3.

Claims

1. the grinding wheel main shaft structure of an engine valve stem numerical control centerless grinder, it comprises main shaft, the main shaft shell, grinding wheel chuck, the end of described main shaft is set with grinding wheel chuck, described main shaft runs through described main shaft shell, it is characterized in that: the two ends of described main shaft shell are provided with five chip hydrodynamic bearings, described main shaft runs through the endoporus of described moving five chip hydrodynamic bearings, have oil circuit in the described main shaft shell, described oil circuit is communicated with the inside oil pocket of described five chip hydrodynamic bearings, described inner oil pocket is distributed in the Inner edge wall of the endoporus of described five chip hydrodynamic bearings, and described inner oil pocket wraps up described main shaft outer edge surface.