CN2127330Y - Drilling machine mainshaft feed apparatus driven by stepper motor - Google Patents

Abstract

The utility model discloses a drilling machine mainshaft feed apparatus driven by a stepper motor, relating to the improvement of a drilling machine feed apparatus. The utility model adopts a stepper motor to control the rapid advance and the stable feed of a driving mainshaft through a driving gear chain and a mainshaft lifting part comprising a worm, a worm wheel, an automotive manual shifting device, a pinion gear and a rack, replacing the feeding manner of an ordinary drilling machine controlling the mainshaft by a main motor. The utility model has the advantages of simple structure, comparatively low cost, feed program control of the mainshaft, etc. The utility model can suitable for the use of the digital control drilling machine of the tri-coordinate microcomputer control.

Description

Drilling machine mainshaft feed apparatus driven by stepper motor

The utility model relates to the drill press spindle feed arrangement, and this device is applicable to micro-processor controlled numerical control drilling machine.

The main shaft proceeding equipment of current drilling machine has following three kinds:

First kind is the common driller main shaft proceeding equipment.It is by the main motor that is contained on the main tapping, and main shaft Lift Part drive shaft such as representative transmission gear train by comprising shifting slide gear and worm screw, worm gear moves up and down.Change the position of engagement of shifting slide gear, can change the gearratio of representative transmission gear train, thereby reach the purpose of adjusting the axis feeding amount.

Second kind is the numerical control drilling machine of workbench two coordinates control.It has adopted the technical scheme of the fast lifting of main shaft by the small-sized AC Motor Control of another beyond the main motor on the main tapping, and an electromagnetic clutch has been installed in main spindle box, when electromagnetic clutch is thrown off small machine work, main shaft F.F.; The electromagnetic clutch combination, the small machine operating current cuts off, and drill press spindle is realized by main motor-driven work feed.This feeding mode still needs to change the amount of feeding of the position of balladeur train with the adjustment main shaft with handle, and also needs control electromagnetic clutch with one group of collision block, with the F.F. that realizes main shaft, conversion and the drilling depth that the worker advances.

The third is the drilling machine of alternating current-direct current driven by servomotor, and it makes the main tapping lifting realize axis feeding by servomotor and ball-screw.

In sum, current drill press spindle feed arrangement all exists tangible deficiency, and the first, the second kind of said feed arrangement all is manually or basic manually control axis feeding amount, and they can not realize that all three coordinates control automatically; The third said feed arrangement, the cost costliness is difficult to apply.

The purpose of this utility model provides a kind of driven by stepper motors, relatively simple for structure, the axis feeding amount is programme controlled, and can cooperate with the stepper motor that drives workbench, realizes the drilling machine three coordinates relatively low drill press spindle feed arrangement of cost of operation automatically under microcomputer control.

The utility model adopts stepper motor by the travelling gear chain part, and comprise worm screw, trunnion axis, be installed on the trunnion axis and worm gear that be meshed with worm screw and motor-driven manual switch mechanism, the main shaft lifting part of pinion, tooth bar, drive the technical scheme that drill press spindle moves up and down, realize its purpose.Its improvement part is following two aspects:

A) said travelling gear chain part, it comprises that initial workpiece driving gear kink is on bearing pin, and become static connection with the output shaft of stepper motor, be installed in the two ends of vertical pivot with initial workpiece driving gear meshed gears and another gear, and being key with vertical pivot is connected, is that key is connected with the tail spare driven gear of the gears engaged that is installed in the vertical pivot lower end with worm shaft, more than said representative transmission gear train be installed in the main spindle box.

B) the said motor-driven manual switch mechanism that is installed on the trunnion axis, it has left out existing over feed mechanism, with the correct location that guarantees that drill press spindle moves up and down.It comprises that worm gear becomes movingly with trunnion axis, and zygote is fixed on the worm gear, and the zygote with the zygote that is fixed on the worm gear is complementary becomes spline to be connected with the spline position of trunnion axis, and can move vertically.Handle set becomes movingly with trunnion axis, directed part becomes spline to be connected with the spline position of trunnion axis, on the end face of end cap, be provided with directed pawl, the pin key that is located on the end cap cooperates with the keyway of directed part, be located at the directed piece and the directed pawl that is located at the end cap end face of directed part end face, equal intercalation is in the deep-slotted chip breaker with specific central angle of handle set end face, and end cap can move axially along trunnion axis.On the trunnion axis of the endoporus of the zygote that is complementary with the zygote that is fixed on the worm gear, be set with spring, and this zygote becomes with handle set, and castellated clutch is secondary to be cooperated.

The utlity model has simple in structurely, cost is relatively low; The kind of drive is simple, and can realize the programme-control of the drill press spindle amount of feeding, and can cooperate with the driving stepper motor of workbench, realizes characteristics such as the automatic operation of drilling machine three coordinates under microcomputer control, is a kind of main shaft proceeding equipment of economical nc drilling machine in fact.

Below in conjunction with drawings and Examples the utility model is further described.

Accompanying drawing 1 is for using the outward appearance sketch of a kind of numerical control drilling machine of the present utility model.

Accompanying drawing 2 is the cutaway view of travelling gear chain part of the present utility model.

Accompanying drawing 3 is the cutaway view of main shaft lifting part of the present utility model, is the A-A cutaway view of accompanying drawing 2.

Accompanying drawing 4 is the enlarged drawing of the T of accompanying drawing 3 to view.

Referring to accompanying drawing 1, stepper motor (2), (7) and the workbench that is installed in cover plate (10) back vertically move stepper motor (not marking among the figure), the pulse command control of being sent by microcomputer device (1). Stepper motor (2) drives drill press spindle (11) and realizes fast moving and work feed, all the other 2 stepper motors be used for to drive workbench (6) and cross slid platform (8) lathe bed (9) realization workbench in length and breadth to movement, the main shaft rotary speed is by handle (3) control, and main spindle box (12) can upward move (not marking among the figure) by handle and gear, tooth bar at guide rail (5). Panel (4) is provided with the forward and reverse rotation ammonium of main shaft (11) button.

Referring to accompanying drawing 2, gear (14) one ends are rotatably installed in by bearing (15) On the bearing pin (16), the other end is by the output shaft static connection of screw (13) with stepper motor (2). Be installed on the spline vertical pivot (24) with gear (14) meshed gears (26), spline vertical pivot (24) is installed in the main spindle box (12) by bearing (25), (22), its lower end and gear (17) spline joint. There is an oil shield (23) bearing (22) top. With gear (17) meshed gears (18) and worm screw (19) static connection. Be packed on the lining (20) with the worm gear (21) of worm screw (9) engagement, lining (20) becomes to be slidingly matched with trunnion axis (38).

Referring to accompanying drawing 3, lining (20) is slidingly matched with trunnion axis (38), zygote (41) is fixed on the worm gear (21), and zygote (42) is connected by spline position (31) with trunnion axis (38), and zygote (42) can slide on trunnion axis (38) vertically. Trunnion axis (38) at zygote (42) endoporus is set with spring (33). Handle set (44) can be at special angle of trunnion axis (38) upper rotary, directed part (39) and trunnion axis (38) spline joint, the pin key (28) that is contained on the end cap (30) cooperates with the keyway that is located at directed part (39) (29), and zygote (42) and handle set (44) both become castellated clutch pair (43), (34) to cooperate. The directed piece (40) that directed part (39) end face is provided with, with the directed pawl (32) on end cap (30) end face all intercalation in the deep-slotted chip breaker with specific central angle (27) of handle set (44) end face, to guarantee that handle set (44) can only rotate a specific angle, thereby make castellated clutch pair (43), (34) of zygote (42) and handle set (44) just throw off or close up, such as accompanying drawing 4.

As shown in Figure 3, when carrying out the microcomputer control operation, end cap (30) is extracted outward, manually make handle set (44) rotation θ angle, then end cap (30) is inwardly advanced, directed pawl (32) inserts deep-slotted chip breaker (27) and the orientation that is located on the handle set (44) Between the piece (40), (shown in the solid line of accompanying drawing 4) thrown off in castellated clutch pair (34), (43) of handle set (44) upper end, moves on the zygote (42) and zygote (41) combination. Stepper motor (2) work under microcomputer (1) control, by representative transmission gear train and worm screw (19) worm gear (21), zygote (41), (42), transmission trunnion axis (38) rotation, and by pinion (37), tooth bar (35) moves up and down collar bush (36) and drill press spindle (11) together. If end cap (30) is outwards extracted, handle set (44) counter-rotating θ angle, again end cap (30) is inwardly advanced, castellated clutch pair (34), (43) of handle set (44) upper end close up (shown in the dotted line of accompanying drawing 4), zygote (42) is under spring (33) effect, throw off with zygote (41), drill press spindle (11) stops power feed. Hand rotation handle set (44), i.e. practicable hand feed.

Embodiment: the model of stepper motor (2) is 110BF, the step angle of stepper motor is 0.75 °, the reference radius of the pinion (37) on the trunnion axis (38) is 24.5mm, the overall ratio of gear (14), (26), (17), (18) is 40:55, worm screw (19) is 1:47 with the speed reducing ratio of worm gear (21), microcomputer (1) whenever sends a pulse command, and main shaft moves up and down apart from S

$\mathrm{S\; =\; \pi \; \times 49\times }\frac{\mathrm{0.75}}{\mathrm{360\; \times }\frac{\mathrm{55}}{\mathrm{40}}\mathrm{\times 47}}\mathrm{=\; 0.00496mm}$

The different instruction that the utility model sends according to microcomputer, stepper motor (2) obtains the pulse signal of varying number, and has different rotating speeds, and drill press spindle (11) also will have the different amount of feeding.

Claims (1)

1, a kind of stepper motor driven drill press spindle feed arrangement, have stepper motor (2) and travelling gear chain part, and comprise worm screw (19), trunnion axis (38), be installed on the trunnion axis (38) and worm gear (21) that be meshed with worm screw (19) and motor-driven manual switch mechanism and pinion (36), the main shaft lifting part of tooth bar (35), it is characterized in that:

A) said travelling gear chain part, it comprises that initial workpiece driving gear (14) kink is on bearing pin (16), and become static connection with the output shaft of stepper motor (2), with gear (14) meshed gears (26) and gear (17), be installed in the two ends of vertical pivot (24), and be key with vertical pivot (24) and be connected, with the tail spare driven gear (18) of gear (17) engagement, be connected for key with worm screw (19) axle, said representative transmission gear train is installed in the main spindle box (12);

B) the said motor-driven manual switch mechanism that is installed on the trunnion axis (38), it comprises that worm gear (21) becomes movingly with trunnion axis (38), zygote (41) is fixed on the worm gear (21), zygote (42) becomes spline to be connected with the spline position (31) of trunnion axis (38), zygote (42) can move vertically, and handle set (44) becomes movingly with trunnion axis (38).Directed part (39) becomes spline to be connected with the spline position (31) of trunnion axis (38), on the end face of end cap (30), be provided with directed pawl (32), the pin key (28) that is located on the end cap (30) cooperates with the keyway (29) of directed part (39), be located at the directed piece (40) and the directed pawl (32) that is located at end cap (30) end face of directed part (39) end face, all intercalation is in the deep-slotted chip breaker with specific central angle (27) of handle set (44) end face, and end cap (30) can move axially along trunnion axis (38), be set with spring (33) on the trunnion axis (38) of zygote (42) endoporus, both become castellated clutch pair (43) zygote (42) and handle set (44), (34) cooperate.

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