CN104107926B - Main shaft direction quick positioning mechanism - Google Patents
Main shaft direction quick positioning mechanism Download PDFInfo
- Publication number
- CN104107926B CN104107926B CN201410306325.2A CN201410306325A CN104107926B CN 104107926 B CN104107926 B CN 104107926B CN 201410306325 A CN201410306325 A CN 201410306325A CN 104107926 B CN104107926 B CN 104107926B
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- Prior art keywords
- main shaft
- positioning
- push rod
- locating wheel
- locating
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention relates to a main shaft direction quick positioning mechanism which solves the problem that working efficiency is low when main shaft positioning is conducted through signal induction. The main shaft direction quick positioning mechanism comprises a positioning wheel, an ejector rod and a driving device, wherein the positioning wheel is provided with a positioning groove in the circumferential direction, and the driving device pushes the ejector rod to slide in the length direction of the ejector rod. A positioning wheel is connected with a main shaft in a sleeved mode, and the positioning wheel and the main shaft rotate in a linkage mode. An assisting part is arranged at the upper end of the ejector rod and can drive the positioning wheel to rotate by a certain angle after making contact with the circumferential surface of the positioning wheel, and the assisting part is clamped to the positioning groove so as to position the main shaft. The invention further relates to a method for achieving main shaft direction positioning. Inclined thrust is generated along an inclined face or an arc face through the assisting part, the inclined thrust enables the positioning wheel to rotate in the direction of the inclined thrust until the assisting part moves into the positioning groove to be clamped to the positioning groove, no signal is needed in the whole process, mechanical main shaft positioning can be achieved quickly, and working efficiency is improved.
Description
Technical field
The present invention relates to detent mechanism, particularly to a kind of major axes orientation quick positioning mechanism.
Background technology
Generally main shaft is only by speeds control, but is also required in some special cases carry out position control to main shaft.For example: need to allow when work in-process carries out automatic tool changer in the heart, in Boring because of technological requirement knife when, and lathe is required for main shaft and is accurately parked on a specific position in card engaging workpiece etc., here it is our usually said main shaft orientation functions.
Main shaft orientation function is exactly that nc sends directional commands, main shaft is made to stop in a defined location by the rotaring signal on the position sensor on main shaft, and equally provide certain holding torque to servomotor position ring, but carry out main shaft orientation by induction of signal has the disadvantage that (1) after changing clamping device or the conversion speed of mainshaft, it is accomplished by again debugging, to guarantee the positioning to main shaft for the signal；(2) during processing profiled part, main shaft is provided with clamping device, now need to main shaft orientation so that this clamping device is adapted with automatic feeding, realize quick neck material, and work as using this induction of signal main shaft orientation mode, before stopping the rotation completely after the speed of mainshaft reduces, main shaft can only be positioned, this process needs the stand-by period of several seconds, especially in batch machining, the accumulation of required stand-by period, seriously constrain working (machining) efficiency.
Content of the invention
Carry out main shaft orientation by induction of signal and lead to ineffective deficiency to overcome, the present invention provides a kind of major axes orientation quick positioning mechanism.
The technical solution adopted in the present invention is: a kind of major axes orientation quick positioning mechanism, its driving means including being circumferentially with the locating wheel of locating slot, push rod and promoting push rod sliding along its length, described locating wheel be socketed on main shaft and with main shaft linkage rotation, described push rod upper end is provided with the power-assist part that locating wheel can be driven after contacting to rotate to an angle with locating wheel perimeter surface, and described power-assist part and locating slot fasten with positioning spindle.
Described locating wheel adopts a locating slot, and, using circle, described power-assist part is using push rod rotatable positioning bearing relatively for described locating slot.
Described locating wheel is heart, and locating wheel salient point b is to axle center apart from s1With minimum point a of locating slot to axle center apart from s2Than for 3:1.
Described locating wheel adopts multiple locating slots of circumferential array, and described power-assist part is that push rod is rotatable relatively positions bearing or the convex circular arc with push rod fixed, and the locating slot engaging therewith is using circular.
Described locating wheel adopts multiple locating slots, and described power-assist part is the triangle with push rod fixed, and the locating slot engaging therewith is also adopted by triangle.
Also include support, and be fixed on the first fixed seat on support, described push rod is set in the first fixed seat.
Described driving means include the second fixed seat and the piston being placed in the second fixed seat with the first fixed seat fixed, and described piston is connected with push rod lower end, to drive push rod.
A kind of method realizing major axes orientation positioning, its step is as follows:
1) motor braking, realizes spindle scram；
2) open driving means, promote push rod along locating wheel radial direction sliding so that power-assist part is contacted with locating wheel by driving means；
3) continue to press on push rod, the oblique thrust along inclined-plane or arc surface is produced by power-assist part, using oblique thrust, locating wheel is rotated along cant force direction, move in locating slot to power-assist part, fasten with locating slot, by main shaft orientation in particular directions.
The invention has the beneficial effects as follows: this invention is adapted with locating wheel using power-assist part, using oblique thrust, locating wheel is rotated along cant force direction, power-assist part is fixed in locating slot, whole process is without signal, and only need zero point can complete for several seconds, mechanical main shaft positioning can quickly be realized, improve operating efficiency.
Brief description
Fig. 1, Fig. 2 are overall schematic of the present invention.
Fig. 3 is the locating wheel that the present invention has six locating slots.
Fig. 4, Figure 11 are the heart-shaped locating wheels that the present invention has a locating slot.
Fig. 5 is the present invention first fixed seat and the connection diagram of the second fixed seat.
Fig. 6 be push rod of the present invention and piston to away from major axes orientation sliding, reach the schematic diagram of maximum displacement.
Fig. 7 be push rod of the present invention and piston near major axes orientation sliding, reach the schematic diagram of maximum displacement.
Fig. 8 is that power-assist part of the present invention contacts schematic diagram with locating wheel any position.
Fig. 9 is the present invention with respect to the force analysis figure after the contact of incline plane of push rod rotatable power-assist part and locating wheel.
Figure 10 is the present invention with respect to the force analysis figure that push rod is after the power-assist part of fixed and the contact of incline plane of locating wheel.
1- main shaft, 2- support, 3- locating wheel, 31- locating slot, 32- inclined-plane, 33- arc surface, 4- push rod, 41- power-assist part, 5- first fixed seat, 6- second fixed seat, 61- piston, 62- first leads to pressure hole, and 63- second leads to pressure hole, 64- spacing hole, 7- motor, 8- belt pulley.
Specific embodiment
Embodiments of the present invention is further illustrated below in conjunction with the accompanying drawings:
As Fig. 1、Fig. 2、Shown in Fig. 6，A kind of main shaft 1 direction locating mechanism，It includes main shaft 1、Support 2、Motor 7、Belt pulley 8，Main shaft 1 is horizontally fixed on support 2，Described motor 7 drives main shaft 1 to rotate or brake by belt pulley 8，Also include the locating wheel 3 being circumferentially with locating slot 31、Push rod 4、The first fixed seat 5 positioned at main shaft 1 lower section and the driving means promoting push rod 4 sliding along its length，Described locating wheel 3 is socketed on main shaft 1 near motor 7 side，It is fixed on main shaft 1 by hold-down bolt，And with main shaft 1 linkage rotation，Described first fixed seat 5 is perpendicular to main shaft 1，And be horizontally fixed on support 2 by four pieces of bolts，Described push rod 4 is set in the first fixed seat 5，Upper end is provided with the power-assist part 41 that locating wheel 3 can be driven after contacting to rotate to an angle with locating wheel 3 perimeter surface，Preferably，Described power-assist part 41 has a low-angle eccentric setting with respect to push rod 4，Avoid the state of complete stress equalization，Described power-assist part 41 is fastened with locating slot 31 with positioning spindle 1，Driving means promote push rod 4，Make push rod 4 first fixed seat 5 relatively to the sliding cooperation near main shaft 1 direction or away from main shaft 1 direction，Requirement according to workpiece to be added，The locating wheel 3 specifically carrying locating slot 31 is installed additional on main shaft 1，By jerk main shaft 1，Power-assist part 41 is engaged with the machinery of locating slot 31，Main shaft 1 is accurately parked on a specific position.
As shown in Figure 5, Figure 6, described driving means are included side and are provided with second fixed seat 6 in first, second logical pressure hole and the piston 61 being connected with push rod 4 lower end, described second fixed seat 6 and the first fixed seat 5 fixed, described piston 61 is placed in the second fixed seat 6, constitute and piston 61 is promoted by the second logical pressure hole 63 pressure, drive push rod 4 to promote piston 61 near main shaft 1 direction sliding or by the first logical pressure hole 62 pressure, drive push rod 4 to the direction sliding away from main shaft 1.Described driving means are cylinder driver or fluid pressure drive device, and it is provided with pressure regulator valve in first, second logical pressure hole access port, air pressure or hydraulic pressure is controlled to pass through the speed that first, second logical pressure hole promotes piston 61 by pressure regulator valve, guarantee that speed will not be too fast and lead to impulse force excessive, damage locating wheel 3, also will not be excessively slow and time-consuming.
As shown in Figure 7, piston 61 is promoted by the first logical pressure hole 62 pressure, drive push rod 4 to main shaft 1 direction sliding, constitute power-assist part 41 to be adapted with locating slot 31, now locating wheel 3 constitutes the position-limit mechanism of push rod 4 and piston 61, limit push rod 4 and piston 61 continues towards main shaft 1 direction sliding, push rod 4 and piston 61 reach maximum displacement；
As shown in Figure 6, piston 61 is promoted by the second logical pressure hole 63 pressure, drive push rod 4 to the direction sliding away from main shaft 1, push rod 4 reaches the spacing hole 64 being arranged on described second fixed seat 6 and the first fixed seat 5 junction, push rod 4 is adapted with described spacing hole 64, now spacing hole 64 limits push rod 4 continuation towards the direction sliding away from main shaft 1, and push rod 4 and piston 61 reach reverse maximum displacement, that is, be in original state.
As shown in Figure 3, Figure 4, described locating wheel 3 peripheral surface is arc surface 33, this arc surface 33 and locating slot 31 the smooth of the edge transition, certainly, arc surface 33 can also be connected with locating slot 31 edge by inclined-plane 32, it is all to smoothly transit it is ensured that power-assist part 41 can be with sliding, finally to locating slot 31 in locating wheel 3 between arc surface 33, inclined-plane 32, locating slot 31.
Described locating wheel 3 adopts multiple locating slots 31 of circumferential array, and described power-assist part 41 is that push rod 4 is rotatable relatively positions bearing or the convex circular arc with push rod 4 fixed, and the locating slot 31 engaging therewith is using circular.Certain, when described locating wheel 3 adopts multiple locating slot 31 of circumferential array, described power-assist part 41 can also be also adopted by triangle using the triangle with push rod 4 fixed, the locating slot 31 engaging therewith.
As Fig. 3、Fig. 8、Shown in Fig. 9，Locating wheel 3 adopts six locating slots 31 of circumferential array，Power-assist part 41 is using positioning bearing，The locating slot 31 engaging therewith is using circular，After main shaft 1 jerk，Push rod 4 drives positioning bearing near main shaft 1 direction sliding，Inclined-plane 32 or arc surface 33 to positioning bearing touch locating wheel 3，Thrust due to push rod 4，Positioning bearing is touched face stop can not be continued to ramp，Positioning bearing is to one active force f1 perpendicular to contact point of contact surface，This active force f1 is broken down into the component f2 parallel with thrust and component f3 that is tangent with contact point and deviating from locating slot 31 direction on the contact surface，Wherein component f3 makes positioning bearing rotate along component f3 direction，And produce reverse friction power f4，Component f2 makes locating shaft adopt as heir continuous rising，Relative，Locating wheel 3 produces the active force f5 relative with frictional force f4，Locating wheel 3 is rotated along active force f5 direction，Positioning bearing is matched with locating wheel 3，Final positioning bearing rotates into locating slot 31，Engage with locating slot 31.As long as power-assist part 41 is using positioning bearing, even if the number of locating slot 31 changes, the principle of positioning bearing and locating slot 31 cooperation or constant.
As shown in Figure 10，When power-assist part 41 using with respect to push rod 4 be fixed convex circular arc or triangle when，Can be to one active force f1 perpendicular to contact point of contact surface behind the inclined-plane 32 of this convex circular arc or triangle contact locating wheel 3 or arc surface 33，This active force f1 is broken down into the component f2 parallel with thrust and component f3 that is tangent with contact point and deviating from locating slot 31 direction on the contact surface，Wherein component f3 makes locating wheel 3 rotate along component f3 direction，Thus giving convex circular arc or one reverse frictional force f4 of triangle，Component f2 makes convex circular arc or triangle continue to rise，Convex circular arc or triangle are matched with locating wheel 3，Frictional force f4 makes convex circular arc or triangle along locating wheel 3 weekly form towards near locating slot 31 direction sliding，Eventually enter into locating slot 31，Engage with locating slot 31；If convex circular arc or triangle contact inclined-plane 32 or the arc surface 33 of locating wheel 3, component f3 can make locating wheel 3 carry out rotate counterclockwise.
As shown in Fig. 4, Fig. 9, Figure 11, when locating wheel 3 adopts a locating slot 31, this locating wheel 3 is heart, described locating slot 31 is using circular, described arc surface 33 adopts gentle cambered surface, and described locating wheel 3 is heart, and the distance of locating wheel 3 surface salient point to axle center is s1, the smoothly transit radius of section arc surface of locating wheel 3 surface and locating slot 31 is s2, s1With s2Ratio be a, the scope of a is: 1 ＜ a≤3, and the width on locating wheel 3 surface is from for s3, s3With s2Ratio is b, the scope of b is: 1≤b≤2.5, wherein the preferred scope of a is 1.8≤a≤2.5, and the preferred scope of b is 2≤b≤2.5, and described power-assist part 41 is using the rotatable positioning bearing of push rod 4 relatively, positioning bearing is driven by push rod 4, positioning bearing rotates along locating wheel 3 surface, and its actual path is to ramp, and locating shaft holds when operating in locating wheel 3 surface, the distance in the every section of cambered surface crossed to locating wheel 3 axle center is more than rear one section of cambered surface to the distance in locating wheel 3 axle center, as the r in Figure 111＞ r2＞ r3, such track has realizability.
A kind of method realizing main shaft 1 positioning, its step is as follows:
1) motor 7 is braked, and realizes main shaft 1 jerk；
2) open driving means, promote push rod 4 to move so that power-assist part 41 is contacted with locating wheel 3 near main shaft 1 direction by driving means；
3) continue to press on push rod 4, oblique thrust along inclined-plane 32 or arc surface 33 is produced by power-assist part 41, using oblique thrust, locating wheel 3 is rotated along cant force direction, move in locating slot 31 to power-assist part 41, fasten with locating slot 31, main shaft 1 is positioned in particular directions.
Described motor 7 adopts direct current generator brake or adopts frequency converter motor brake, and braking motor 7 just makes main shaft 1 completely stop the rotation in zero point in several seconds by belt pulley 8, that is, achieves the jerk of main shaft 1.
Shape according to workpiece to be added needs or the angle needs for workpiece, workpiece to be added is neatly emitted on pay-off, corresponding clamping device is provided with main shaft 1, during operation, stopping main shaft 1 is needed to rotate, and complete main shaft 1 and position, consistent on direction with for workpiece to ensure this clamping device, to realize being connected of pay-off and clamping device, workpiece to be added is moved on clamping device from pay-off, realize automation batch machining, and existing induction of signal, completing this process needs the time of several seconds, and use detent mechanism involved in the present invention and positioning mode, complete this process and only need to zero point several seconds, often processing one can save several seconds time, mass production, the time saved is considerable, greatly improve the speed of processing, thus improving operating efficiency.
Other, alteration of form for workpiece, now need to change clamping device, even need to change main shaft 1 rotating speed, to meet processing request, now, need signal is debugged again, to guarantee being connected of clamping device and pay-off, debugging required time, also to be determined according to the technical ability qualification of operator, and detent mechanism involved in the present invention, only correspondingly change have different locating slots 31 locating wheel 3 just permissible, need not again debug, avoid the complicated processes of debugging, convenient and swift, and this equipment could be operated with respect to debugging must be grasped, this detent mechanism has no requirement to operator, range is wider, practicality is higher.
As shown in Figure 3, when workpiece to be added is axial symmetry hexagonal star-wheel shape shape, as long as clamping device is consistent on direction with for workpiece, ensure that being connected of clamping device and pay-off, now it is socketed a locating wheel 3 with six locating slots 31, and ensure locating wheel 3, clamping device, workpiece inceptive direction to be added is consistent, after processing when motor 7 is braked, main shaft 1 stall, no matter now clamping device is in any angle, rotated by power-assist part 41, eventually engaged with one of locating slot 31, locating wheel 3, clamping device, workpiece to be added can keep consistent on direction all the time, achieve the positioning of main shaft 1.
As shown in Figure 4, when workpiece to be added is single angular, as long as clamping device is consistent on direction with for workpiece, ensure that being connected of clamping device and pay-off, now it is socketed heart-shaped locating wheel 3, ensure that locating wheel 3, clamping device, workpiece inceptive direction to be added are consistent, after processing when motor 7 is braked, main shaft 1 stall, no matter now clamping device is in any angle, by positioning bearing rotary, eventually engaged with locating slot 31, locating wheel 3, clamping device, workpiece to be added can keep consistent on direction all the time, that is, achieve the positioning of main shaft 1.
Only the preferred embodiment of the present invention above in association with the embodiment described by accompanying drawing, and the not restriction to protection scope of the present invention, any all ought to be within the scope of the present invention based on the improvement that present invention spirit is done.
Claims (3)
1. a kind of major axes orientation quick positioning mechanism，It is characterized in that: it includes the locating wheel (3) being circumferentially with locating slot (31)、Push rod (4) and the driving means promoting push rod (4) sliding along its length，Described locating wheel (3) be socketed in main shaft (1) upper and with main shaft (1) linkage rotation，Described push rod (4) upper end is provided with the power-assist part (41) that locating wheel (3) can be driven to rotate to an angle after contacting with locating wheel (3) perimeter surface，Described power-assist part (41) and locating slot (31) fasten with positioning spindle (1)，Described locating wheel (3) adopts a locating slot (31)，Described locating slot (31) is using circular，Described power-assist part (41) is using the rotatable positioning bearing of push rod (4) relatively，Described locating wheel (3) is heart，The distance in locating wheel (3) surface salient point to axle center is s1, the smoothly transit radius of section arc surface of locating wheel (3) surface and locating slot (31) is s2, s1With s2Ratio be a, the scope of a is: 1 ＜ a≤3, and the width on locating wheel (3) surface is from for s3, s3With s2Ratio is b, and the scope of b is: 1≤b≤2.5.
2. a kind of major axes orientation quick positioning mechanism according to claim 1 it is characterised in that: also include support (2), and be fixed on the first fixed seat (5) on support (2), described push rod (4) is set in the first fixed seat (5).
3. a kind of major axes orientation quick positioning mechanism according to claim 2, it is characterized in that: described driving means include the second fixed seat (6) with the first fixed seat (5) fixed and the piston (61) being placed in the second fixed seat (6), described piston (61) is connected with push rod (4) lower end, to drive push rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306325.2A CN104107926B (en) | 2014-07-01 | 2014-07-01 | Main shaft direction quick positioning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306325.2A CN104107926B (en) | 2014-07-01 | 2014-07-01 | Main shaft direction quick positioning mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104107926A CN104107926A (en) | 2014-10-22 |
| CN104107926B true CN104107926B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410306325.2A Expired - Fee Related CN104107926B (en) | 2014-07-01 | 2014-07-01 | Main shaft direction quick positioning mechanism |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203944854U (en) * | 2014-07-01 | 2014-11-19 | 乐清市象塔机床厂 | A kind of major axes orientation quick positioning mechanism |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201008997Y (en) * | 2007-02-27 | 2008-01-23 | 南通天擎机床有限公司 | Numerical control roller passing hollow miller |
| CN201482990U (en) * | 2009-07-06 | 2010-05-26 | 厦门精合电气自动化有限公司 | Constant pressure pre-tightening device of high-speed main shaft bearing |
| CN101797691B (en) * | 2010-03-25 | 2012-06-27 | 杨春炜 | Automatic lathe for processing spanner |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203944854U (en) * | 2014-07-01 | 2014-11-19 | 乐清市象塔机床厂 | A kind of major axes orientation quick positioning mechanism |
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| CN104107926A (en) | 2014-10-22 |
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Granted publication date: 20170118 Termination date: 20180701 |