CN203292507U - High-speed and large-resistance gear main shaft assembly of numerical control drilling and milling machine - Google Patents

Abstract

The utility model discloses a high-speed and large-resistance gear main shaft assembly of a numerical control drilling and milling machine. The high-speed and large-resistance gear main shaft assembly solves the problem that an existing main shaft cannot meet the requirement of machining performance of a drilling machine and a milling machine at the same time. The high-speed and large-resistance gear main shaft assembly is characterized in that a main shaft is installed in a shaft sleeve through three sets of bearings, a pair of cylindrical roller bearings and a set of bidirectional angular contact ball bearings are arranged at the lower end of the main shaft, paired angular contact ball bearings are arranged at the upper end of the main shaft, a cutter changing mechanism is installed in a core hole of the main shaft, and an elastic grasping three-jaw can clamp a cutter rod automatically and tension the cutter rod upwards; the main shaft can be used in a gear box safely, and lubricating oil in a box body cannot enter an inner cavity and an outer cavity of the main shaft so that oil leakage of the main shaft and the damage to the bearings can be avoided; a main shaft gear is installed at the appropriate position of the main shaft and is meshed with a tail stage gear of a transmission system in the box body, and a rotation speed is input by the transmission system. If a user requires automatic cutter changing, the user only needs to install an encoder on the main shaft to control the rotation speed of the main shaft and directed parking, a cutter releasing air cylinder is installed on an upper cover of the box body and aligns at the upper end of the main shaft, a cutter bank is additionally installed at the left side of a stand column, a numerical control system is used for controlling, and rapid and automatic cutter changing can be achieved due to the cooperation of the air cylinder.

Description

The large drag gear main shaft assembly of numerical control drilling-milling height of bed speed

One, technical field

The utility model belongs to the metal working machine tool field, relates in particular to the large drag gear of a kind of numerical control drilling-milling machine tool high speed main shaft.

Two, background technology

Numerical control drilling machine is the upgraded product of common driller, and along with application and mechanical, electrical, the liquid integrated design of product of Numeric Control Technology, machine finish and automatization level are brought up to a new height.Further expand machine tool capability, make lathe can not only fully meet the boring performance requirement and can fully meet the Milling Process performance, and can automatic tool changer, good seal performance, can use safely in the gear-box of oil jet lubrication, so just can further improve the lathe cost performance, satisfying the market needs.Reach above-mentioned requirements, except transmission system for spindle box will upgrade design, main shaft is one of key issue, solve traditional drill press spindle be not suitable with high rotating speed and can not automatic tool changer and traditional milling spindle can not bear the problems such as large axially drag, redesigning a kind of energy meets brill, mills processing characteristics requirement, good airproof performance, can use safely in the enclosed gear-box, total meet the self high-speed main spindle member that the gear drive of oil jet lubrication requires, can automatic tool changer, exactly the current difficult problem that will solve.

Three, summary of the invention

The purpose of this utility model is to provide a kind ofly can meet the high-speed smooth milling, bear large radial load, low-speed big boring, bear large axially load, good seal performance, can use safely in the gear housing of oil jet lubrication, and self main shaft assembly spare that can automatic tool changer.

The technical solution of the utility model is: it is comprised of the parts such as knife-changing system in the outside installation and debugging part of main shaft and main shaft core hole, main shaft is installed in axle sleeve by three pairs of bearings, be that a pair of cylinder roller bearing and one group of bidirectional angular contact ball bearing are installed in the main shaft lower end, by bottom end cover, bearing inner washer, bearing outer washer and setscrew nut be fixed in bearing inner race on main shaft respectively, bearing outer ring is fixed in axle sleeve, install and locate and adjust the bearing preload lotus.The pair of horns contact ball bearing is installed between axle sleeve upper end and main shaft, respectively by bearing inner washer, bearing outer washer, upper end cover and two clamp nuts, by bearing inner race be fixed on main shaft, outer ring is fixed in axle sleeve, install and locate and adjust the bearing preload lotus, make the main shaft can independent rotation with respect to axle sleeve, and at the main shaft epimere, travelling gear is set, and the final-stage gear of the transmission system in this gear and transmission case is meshed, and described knife-changing system is arranged in the core hole of main shaft.Described knife-changing system is by elasticity, to firmly grasp three-jaw, spacing adjustment packing ring, pull bar, limit spring packing ring, butterfly spring group, spring washer, clamp nut and locking nut to form; Elasticity is firmly grasped three-jaw, the screw rod that spacing adjustment packing ring and pull bar are firmly grasped the three-jaw upper end by elasticity is linked togather the three, component movement is conjuncted, pack in main shaft core hole, pull bar upper end pack into successively limit spring packing ring, butterfly spring group) and spring washer, the pull bar top is screw rod, and the clamp nut of packing into is compressed to preseting length by the butterfly spring group, by locking nut, is locked.Described main shaft upper end cover is embedded end cap, with main shaft and axle sleeve contact site, the O RunddichtringO all is housed, and the contact-making surface in the clamp nut of pull bar upper end and main shaft core hole is equipped with the O RunddichtringO, prevents that external lubrication oil from entering main shaft core hole and being equipped with in the die cavity of bearing.

The beneficial effect of contrast prior art technical solutions of the utility model is: the processing characteristics that (1) is different with milling according to drilling, main axle structure design and bearing configuration have been optimized, improved the main shaft rigidity, can not only export high pulling torque, simultaneously can when milling, bear respectively large radial load, during drilling, bear large axially load.(2) good airproof performance.Improved main shaft sealing construction and designed and install additional the O RunddichtringO, guaranteed that main shaft uses safely having under oil environment, in casing, lubricating oil can not enter die cavity between main shaft core hole and main shaft and axle sleeve, causes oil leakage of main shaft and damages bearing.(3) set up knife-changing system, alleviated tool changing operation labour intensity, improved the tool changing operating efficiency.Can install tool magazine additional and realize automatic tool changer.

Below in conjunction with accompanying drawing, the utility model is further described.

Four, accompanying drawing explanation

Fig. 1 is the utility model structural representation.

in figure: 1 is main shaft, 2 is axle sleeve, 3 is bottom end cover, 4 is the bearing inner washer, 5 is cylinder roller bearing, 6 is the bearing outer washer, 7 is the bidirectional angular contact ball bearing, 8 is setscrew nut, 9 is the bearing inner washer, 10 is angular contact ball bearing, 11 is the bearing outer washer, 12, 14 is clamp nut, 13 is upper end cover, 15 firmly grasp three-jaw for elasticity, 16 is spacing adjusting pad circle, 17 is pull bar, 18 is spacing spring washer, 19 is the butterfly spring group, 20 spring washers, 21 is clamp nut, 22 is locking nut, 23, 24 is the O RunddichtringO, 25 is travelling gear, 26 is knife bar, 27 is encoder.

Five, the specific embodiment

As shown in Figure 1, main shaft assembly is comprised of main shaft 1, axle sleeve 2, bottom end cover 3, upper end cover 13, bearing washer, setscrew nut 8, clamp nut 21, three groups of bearings and knife-changing system.A pair of garden post roller bearing 5 and one group of bidirectional angular contact ball bearing 7 are installed in main shaft 1 lower end, by bottom end cover 3, bearing inner washer 4, bearing outer washer 6 and setscrew nut 8, bearing inner race is fixed on main shaft 1 respectively, bearing outer ring is fixed in axle sleeve 2, installs and locates and adjust the bearing preload lotus.Pair of horns contact ball bearing 10 is installed in main shaft 1 upper end, respectively by bearing inner washer 9, bearing outer washer 11, upper end cover 13 and two clamp nuts 12,14 by bearing inner race be fixed on main shaft 1, outer ring is fixed in axle sleeve 2, install and locate and adjust the bearing preload lotus.Main shaft 1 can independent rotation with respect to axle sleeve 2.Pull bar 17 and elasticity are housed in main shaft core hole, and to firmly grasp three-jaw 15 motion conjuncted; Specifically: the upper end that elasticity is firmly grasped three-jaw 15 is screw rod, and spacing adjustment packing ring 16 is sleeved on screw rod, then screw rod is screwed into to pull bar 17 lower ends is fixedly connected with and is integral.Pull bar 17 and elasticity are firmly grasped in the conjuncted main shaft core hole of packing into of three-jaw 15, the pull bar 17 upper ends limit spring packing ring 18 of first packing into, reinstall butterfly spring group 19, reinstall spring washer 20, there is screw thread on pull bar 17 tops, clamp nut 21 is screwed on pull rod screw, and the butterfly spring group is compressed to design length, then locking nut 22 lockings of screwing on.In described scheme, elasticity is firmly grasped three-jaw 15 lower ends endoporus, vertically have the 3 road notches of dividing equally, become three-jaw, the shape of its endoporus similar with the clamping plush copper shape of knife bar used 26 upper ends (knife bar is the outsourcing instrument, is standard component), the three-jaw position is flexible through Overheating Treatment, it is taper that elasticity is firmly grasped three-jaw 15Wai garden, main shaft lower end core bore dia is firmly grasped the Da Duanwai garden of three-jaw less than elasticity, under normality, elasticity is firmly grasped three-jaw and is opened, and knife bar 26 upper end clamping plush coppers can be inserted three-jaw lower end endoporus.After clamp nut 21 is compressed to design length by butterfly spring group 19, tension force effect due to butterfly spring group 19, making pull bar 17 and elasticity firmly grasp three-jaw 15 moves conjuncted upwards mobile in main shaft core hole, elasticity is firmly grasped three-jaw 15 and because the Qi Wai garden is subject to the inner hole of spindle diameter, is limited in the process of moving up, make the three-jaw position be squeezed and endoporus elasticity is dwindled, elasticity is firmly grasped three-jaw 15 lower end endoporus and is narrowed down to the tension of knife bar 26 clamping plush coppers being clamped and make progress and be the design attitude of standard.Specifically: after pull bar 17 and elasticity are firmly grasped the three-jaw 15 conjuncted main shaft core holes of packing into of motion, by the spacing adjustment packing ring 16 in lower end and 18, upper end limit spring packing ring, adjusted and position-limiting action, while making to move conjuncted moving up, can guarantee knife bar 26 clamping plush coppers are clamped, strained; While moving down, can make elasticity firmly grasp that three-jaw 15 opens, knife bar 26 clamping plush coppers can be inserted into the three-jaw endoporus smoothly, position all can not overstep the extreme limit while moving conjuncted moving up or down.

State during the main shaft normal operation: while packing main shaft assembly into the drilling and milling machine tool main spindle box, first axle sleeve 2 is inserted in the box body main hole, with bolt, axle sleeve 2 is fixed on box body wall, travelling gear 25 is contained in main shaft 1 appropriate location, with the two flat keys of main shaft 1 use, connect, in casing, final-stage gear and the travelling gear 25 of transmission system are meshed, and the spindle motor rotating speed, by the transmission system shift, drives main shaft by final-stage gear and rotates.

The fixed form of knife bar during work: due to the tension force effect of abjusting spring group 19, it is conjuncted upwards mobile in main shaft core hole that pushing drawing rod 17 and elasticity are firmly grasped three-jaw 15 motions, elasticity is firmly grasped three-jaw 15 and is moved up in process because the Qi Wai garden is subject to main shaft 1 diameter of bore restriction, the three-jaw position is squeezed endoporus elasticity is dwindled, and elasticity is firmly grasped three-jaw 15 lower end endoporus and narrowed down to and knife bar clamping plush copper (outsourcing piece) is clamped and the tension that makes progress is the conjuncted default position that moves up of pull bar motion.Pull bar 17 and elasticity firmly grasp three-jaw 15 motion conjuncted in main shaft core hole the movement position that can not overstep the extreme limit upwards, by the spacing adjustment packing ring 16 on pull bar 17 screw rods, is adjusted with spacing.

Main shaft oriented stopping and automatic tool changer: when the user needs lathe to possess the automatic tool changer performance, should install tool magazine additional, and in the main shaft upper end, install encoder 27(outsourcing piece additional) and loose cutter cylinder (outsourcing piece) is installed, the cylinder piston rod head is aimed at pull bar 17 tops in main shaft core hole, keeps certain distance (adjustable).The effect of encoder 27 is to control the speed of mainshaft and oriented stopping, meets tool magazine tool changing requirement.pine cutter cylinder starting during tool changing, cylinder piston rod promotes main shaft core hole draw-in bar 17 and elasticity is firmly grasped conjuncted the moving down (in accompanying drawing of three-jaw 15 motion, the direction of arrow is loose cutter cylinder piston rod pressure direction), when elasticity was firmly grasped three-jaw 15 and moved down, three-jaw elasticity was opened, return to normal, knife bar clamping plush copper can exit from the three-jaw endoporus smoothly, when old knife bar is exited, after new knife bar has inserted (by tool magazine, being completed), cylinder stops air feed, piston rod is return, tension force effect due to butterfly spring group 19, it is conjuncted upwards mobile in main shaft core hole that pushing drawing rod 17 and elasticity are firmly grasped three-jaw 15 motions, elasticity is firmly grasped three-jaw 15 and again is extruded, endoporus dwindles, by the tension of clamping and make progress of the clamping plush copper of the knife bar of newly packing into, tool changing namely completes.Pull bar 17 and elasticity firmly grasp three-jaw 15 motion conjuncted move down stroke, by adjusting the cylinder piston throw of lever, control.

Claims (3)

1. the large drag gear main shaft assembly of numerical control drilling-milling height of bed speed, it is comprised of the knife-changing system in the outside installation and debugging part of main shaft and main shaft core hole, it is characterized in that: main shaft (1) is installed in axle sleeve (2) by three pairs of bearings, be that a pair of cylinder roller bearing (5) and one group of bidirectional angular contact ball bearing (7) are installed in main shaft (1) lower end, by bottom end cover (3), bearing inner washer (4), bearing outer washer (6) and setscrew nut (8) are fixed in bearing inner race respectively (1) on main shaft, bearing outer ring is fixed in axle sleeve (2), install and locate and adjust the bearing preload lotus, pair of horns contact ball bearing (10) is installed between axle sleeve (2) upper end and main shaft (1), respectively by bearing inner washer (9), bearing outer washer (11), upper end cover (13) and two clamp nuts (12, 14), bearing inner race is fixed on main shaft (1), outer ring is fixed in axle sleeve (2), install and locate and adjust the bearing preload lotus, make the main shaft (1) can independent rotation with respect to axle sleeve (2), and at main shaft (1) epimere, travelling gear (25) is set, the final-stage gear of the transmission system in this gear and transmission case is meshed, described knife-changing system is arranged in the core hole of main shaft (1).

2. the large drag gear main shaft assembly of numerical control drilling-milling height of bed speed according to claim 1, it is characterized in that: described knife-changing system is to firmly grasp three-jaw (15), spacing adjustment packing ring (16), pull bar (17), limit spring packing ring (18), butterfly spring group (19), spring washer (20), clamp nut (21) and locking nut (22) formation by elasticity; Elasticity is firmly grasped three-jaw (15), the screw rod that spacing adjustment packing ring (16) and pull bar (17) are firmly grasped the three-jaw upper end by elasticity is linked togather the three, component movement is conjuncted, pack in main shaft core hole, pull bar (17) upper end pack into successively limit spring packing ring (18), butterfly spring group (19) and spring washer (20), pull bar (17) top is screw rod, and the clamp nut of packing into (21) is compressed to preseting length by the butterfly spring group, by locking nut (22), is locked.

3. the large drag gear main shaft assembly of numerical control drilling-milling height of bed speed according to claim 2, it is characterized in that: described main shaft (1) upper end cover (13) is embedded end cap, with main shaft (1) and axle sleeve (2) contact site, the O RunddichtringO all is housed, the clamp nut of pull bar upper end (21) is equipped with the O RunddichtringO with the contact-making surface in main shaft core hole, prevents that external lubrication oil from entering main shaft core hole and being equipped with in the die cavity of bearing.

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