Deep Hole electricity main shaft
Technical field
The utility model relates to the technical field of grinding machine, particularly relates to a kind of deep Hole electricity main shaft.
Background technology
Common built-in grinding electricity main shaft (hereinafter to be referred as electric main shaft) is the high speed and precision main shaft functional part that a kind of rotor and main shaft unite two into one, can variable-frequency stepless speed-regulating, running is steadily reliable, has load characteristic preferably, can be widely used in the aperture grinding of general-purpose grinder.The grinding degree of depth is generally in 200mm.But along with improving constantly of modern processing, common grinding depth can not satisfy processing request, and the degree of depth is at 300mm, and the deep Hole more than the 400mm, 500mm has become a problem of present processing.And common electric main shaft can't satisfy this processing request.The grinding degree of depth of common electric main shaft mainly is to add that by electric main-axis end size the size of grinding extension bar decides.And the structure of common electrical main shaft has determined that the spindle nose size can not be oversize, and generally in 30-40mm, the length of grinding extension bar also about 150mm, has so just determined electric main shaft grinding degree of depth maximum to be no more than 200mm.
The utility model content
The purpose of this utility model is in order to address the above problem, a kind of deep Hole electricity main shaft to be provided, coming the deep hole part of working depth more than 200mm.
The technical solution of the utility model is: a kind of deep Hole electricity main shaft, contain grinding spindle and prolong mechanism and electric main shaft, this grinding spindle extending structure is installed in electric front-end of spindle, this grinding spindle prolongs mechanism and contains grinding extension bar, axle sleeve, belt shaft, connecting axle, described axle sleeve is a hollow elongated tube, end at axle sleeve is provided with the connection disk body, and the support of this connection disk body and electric main shaft links together; Described connecting axle, belt shaft are installed in described hollow elongated tube inside, and near terminal pad one end, belt shaft is at the other end in hollow pipe for connecting axle; Connect by shaft coupling between described connecting axle and the belt shaft, described connecting axle also is connected with shaft coupling near an end that connects disk body, this shaft coupling connects electric main shaft and connecting axle, and described belt shaft stretches out on the termination of hollow pipe described grinding extension bar is installed.
Described connecting axle is installed in axle sleeve inside by the axle axle, and described belt shaft also is to be installed in axle sleeve inside by bearing.
Be provided with hermetically-sealed construction between the end of described belt shaft and axle sleeve hollow pipe, the sealing structure contains sealing ring, the preceding seal cover that is contained in the hollow pipe termination and is installed in two inner seal rings that interlock mutually in the hollow pipe.
The installation bearing of described belt shaft has two groups, be set in the two ends of belt shaft, be provided with the elasticity pre-pressing structure between two groups of bearings, this elasticity pre-pressing structure contains spacer, adjustment packing ring, the spring base that is sleeved between belt shaft and the hollow pipe, spring, spring pad; Described two groups of bearings all contain two bearings and are supported on inside and outside dottle pin between the bearing; The inner end of described belt shaft is provided with the adjustment nut, is pressed on the bearing in advance.
Described connection disk body is fixedly connected on the support termination of electric main shaft by fastening bolt.
The beneficial effects of the utility model
This deep Hole electricity main shaft can make the working depth of grinding electricity main shaft prolong by installing the grinding spindle extending structure additional, makes grinding electricity main shaft can process 600mm with interior deep hole.。
The belt shaft of the prolongation mechanism of this deep Hole electricity main shaft is installed in the axle sleeve by bearing, and is provided with corresponding location and elasticity pre-pressing structure, can guarantee the precision of its transmission, thereby guarantees machining accuracy.
This deep Hole electricity spindle operation is very steady, and machining accuracy is also very accurate, and the grinding extension bar is beated and can be controlled in 3/1000ths, and the grinding performance is very stable, and roughness reaches below 0.4.
Description of drawings
Fig. 1 is a deep Hole electricity main axle structure schematic diagram.
The specific embodiment
Referring to Fig. 1,1. grinding extension bars among the figure, 2. belt shaft, 3. before sealing ring, 4. before seal cover, 5. inner seal ring, 6. inner seal ring, 7. dottle pin, 8. dottle pin, 9. spacer, 10. adjusting pad, 11. spring housings, 12. spring pads, 13. dottle pins, 14. dottle pins, 15. are adjusted nuts, 16. shaft couplings, 17. connecting axles, 18. and are connected disk bodies, 19. axle sleeves, 20. supports, 21. electric main shafts.
Embodiment: a kind of deep Hole electricity main shaft, contain grinding spindle and prolong mechanism and electric main shaft, this grinding spindle extending structure is installed in electric front-end of spindle, this grinding spindle prolongs mechanism and contains grinding extension bar, axle sleeve, belt shaft, connecting axle, described axle sleeve is a hollow elongated tube, end at axle sleeve is provided with the connection disk body, and the support of this connection disk body and electric main shaft links together; Described connecting axle, belt shaft are installed in described hollow elongated tube inside, and near terminal pad one end, belt shaft is at the other end in hollow pipe for connecting axle; Connect by shaft coupling between described connecting axle and the belt shaft, described connecting axle also is connected with shaft coupling near an end that connects disk body, this shaft coupling connects electric main shaft and connecting axle, and described belt shaft stretches out on the termination of hollow pipe described grinding extension bar is installed.
Described connecting axle is installed in axle sleeve inside by the axle axle, and described belt shaft also is to be installed in axle sleeve inside by bearing.
Be provided with hermetically-sealed construction between the end of described belt shaft and axle sleeve hollow pipe, the sealing structure contains sealing ring, the preceding seal cover that is contained in the hollow pipe termination and is installed in two inner seal rings that interlock mutually in the hollow pipe.
The installation bearing of described belt shaft has two groups, be set in the two ends of belt shaft, be provided with the elasticity pre-pressing structure between two groups of bearings, this elasticity pre-pressing structure contains spacer, adjustment packing ring, the spring base that is sleeved between belt shaft and the hollow pipe, spring, spring pad; Described two groups of bearings all contain two bearings and are supported on inside and outside dottle pin between the bearing; The inner end of described belt shaft is provided with the adjustment nut, is pressed on the bearing in advance.
Described connection disk body is fixedly connected on the support termination of electric main shaft by fastening bolt.