CN104942609B - A kind of gear-rack drive rotary table - Google Patents
A kind of gear-rack drive rotary table Download PDFInfo
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- CN104942609B CN104942609B CN201510395566.3A CN201510395566A CN104942609B CN 104942609 B CN104942609 B CN 104942609B CN 201510395566 A CN201510395566 A CN 201510395566A CN 104942609 B CN104942609 B CN 104942609B
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- rack
- cylinder sleeve
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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
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The present invention relates to a kind of gear-rack drive rotary table, it includes workbench, casing, lifting drive mechanism, rotary motion mechanism and anti-backlash mechanism；Rotary motion mechanism uses gear-rack drive, and rack is made up of two rack superpositions；Anti-backlash mechanism includes lead screw shaft, bearing spider, needle bearing, nut, nut bearing and the plane scroll spring being positioned in the cavity that two racks are internally formed.The rotary table uses Driven by Hydraulic Cylinder, it is possible to achieve the 180 degree of rotary table determines angle indexing, can eliminate gap automatically, and transmits that moment of torsion is big, simple in construction, reliable operation.
Description
Technical field
The invention belongs to technical field of lathe equipment, it is related to the rotary table of Digit Control Machine Tool, can especially eliminates automatically
The rotary table of the gear-rack drive of backlash.
Background technology
High-precision rotary table is one of indispensable important component of Digit Control Machine Tool, and 180 are needed in some occasions
Degree determines the rotary table of angle indexing.Realize and determine angle indexing, be to compare using Driven by Hydraulic Cylinder, rack-and-pinion auxiliary driving
Good selection.But rack pinion often has backlash, this requires rack and pinion drive mechanism must be taken to arrange
Elimination backlash is applied, to ensure the Bidirectional driving precision of mechanism.Therefore, for high-precision lathe, gear teeth is eliminated
The gap of bar mechanism becomes particularly important.
The method that the gap of elimination pinion and rack is generally used at present is biplate thickness engaging side set adjusting method.In the party
In method, when gap occurs in pinion and rack, two panels thickness engaging mutual dislocation is made by the pulling force of spring.Although this method energy
It is enough automatically to eliminate gap, but because transmission moment of torsion is limited by spring tension, so planting anti-backlash mechanism can be used only in transmission
Less occasion is loaded, there is presently no applied to high-precision rotary table.
In view of above-mentioned, it is necessary to find between the NC rotary table transmission that a kind of new method eliminates gear-rack drive
Gap, to ensure positive and negative motion transmission precision.
The content of the invention
The present invention proposes a kind of simple in construction, high transmission accuracy to solve the problem of existing above-mentioned prior art is present,
The rotary table of the gear-rack drive of backlash can be eliminated automatically.
The present invention is achieved by the following scheme：
Above-mentioned gear-rack drive rotary table, including workbench and casing, the workbench by splined shaft with
The casing assembly connection, and by the splined shaft support limit；The rotary table also includes lifting drive mechanism, returned
Turn drive mechanism and anti-backlash mechanism；Described rotary motion mechanism, lifting drive mechanism and anti-backlash mechanism is installed in the case
In vivo, and described rotary motion mechanism and lifting drive mechanism are respectively with the splined shaft assembly connection and driving the spline
Axle；The rotary motion mechanism mainly includes gear shaft, rack, the second cylinder sleeve, left end cap, left piston, the 3rd cylinder sleeve, right end cap
And right piston；The gear shaft is linked together by spline engagement with the splined shaft；The rack be by the first rack and
The superposition of second rack of rack two is constituted, and is engaged with the gear on the gear shaft；Described the second cylinder sleeve and the 3rd cylinder sleeve is same
Axle is arranged in the casing；Described left piston and right piston is separately mounted to the left and right ends of the rack, is respectively placed in
In second cylinder sleeve and the 3rd cylinder sleeve；Described left end cap and right end cap are fixedly connected in the casing left and right ends respectively
On, and be fixedly connected respectively with second cylinder sleeve and the 3rd cylinder sleeve；Described left end cap, left piston, the second cylinder sleeve structure together
Into the left chamber of oil cylinder, described right end cap, right piston, the 3rd cylinder sleeve constitute the right chamber of oil cylinder together；The anti-backlash mechanism includes
Lead screw shaft, bearing spider, needle bearing, nut, nut bearing and plane scroll spring；Described lead screw shaft, bearing spider, rolling
Needle bearing, nut, nut bearing and plane scroll spring are all positioned over being internally formed for first rack and the second rack
In cavity；The lead screw shaft two ends are arranged on the bearing spider by the needle bearing, and the bearing spider is fixed on
On second rack；Described lead screw shaft matches with nut, and the nut is arranged on described first by the nut bearing
On rack；The two ends of the plane scroll spring are separately fixed in the lead screw shaft and second rack.
Described gear-rack drive rotary table, wherein：First rack and second spline thicknesses are equal,
And the first described rack is equal with the gear width of the gear shaft with the thickness sum of the second rack.
Described gear-rack drive rotary table, wherein：The lifting drive mechanism mainly includes the first cylinder sleeve, piston
Bar, closure and thrust ball bearing；First cylinder sleeve is fixedly connected on by screw on the inwall of the casing；The piston
Piston is machined with bar, first cylinder sleeve is arranged in, front end is contacted by the thrust ball bearing with the splined shaft；It is described
Closure is located at the rear end of the piston rod, is fixedly connected on first cylinder sleeve.
Beneficial effect：
The gear-rack drive rotary table of the present invention, uses Driven by Hydraulic Cylinder, using gear-rack drive
Rotary motion mechanism, it is possible to achieve the 180 degree of rotary table determines angle indexing, and the rack of the rotary motion mechanism is used
Double rack structure, with reference to the anti-backlash mechanism of setting, when there is drive gap between the wheel and rack of gear shaft, plane scroll bullet
Spring can give one rotational torque of lead screw shaft of anti-backlash mechanism, drive lead screw shaft to rotate an angle, make occur one between two racks
Individual axial relative displacement, that is, realize the first rack and the second rack side set, increases equivalent transverse tooth thickness, so as to eliminate on gear shaft
Wheel and rack between drive gap.Therefore, gear-rack drive rotary table of the invention can eliminate gap automatically, and
And the motion of rack side set is irreversible, transmission moment of torsion is unrelated with the elastic force of plane scroll spring, and transmission moment of torsion is big, structure is simple
Single, reliable operation.
Brief description of the drawings
Fig. 1 be the present invention can eliminate the gear-rack drive rotary table main sectional view in gap automatically；
Fig. 2 is the revolved sectional view along A-A shown in Fig. 1；
Fig. 3 is Fig. 2 sectional view along B-B；
Fig. 4 is Fig. 2 sectional view along C-C；
Fig. 5 is Fig. 2 sectional view along E-E.
Shown in figure：
1- workbench the second cylinder sleeves of 53-
2- splined shaft 54- left end caps
3- casing 55- left pistons
The cylinder sleeve of 4- liftings drive mechanism 56 the 3rd
41- the first cylinder sleeve 57- right end caps
42- piston rod 58- right pistons
43- closure 6- anti-backlash mechanisms
44- thrust ball bearing 61- lead screw shaft
5- rotary motion mechanism 62- bearing spiders
51- gear shaft 63- needle bearings
52- rack 64- nuts
521- the first rack 65- nut bearings
522- the second rack 66- plane scroll springs
Embodiment
As shown in Figures 1 to 5, gear-rack drive rotary table of the invention, using hydraulic-driven, including workbench
1st, casing 3, lifting drive mechanism 4, rotary motion mechanism 5 and anti-backlash mechanism 6；Wherein workbench 1 passes through splined shaft 2 and casing
3 assembly connections, and by the support limit of splined shaft 2, and workbench 1 is fixedly connected on splined shaft 2 by screw；Revolution driving machine
Structure 4, lifting drive mechanism 5 and anti-backlash mechanism 6 are installed in casing 3, and rotary motion mechanism 3 and lifting drive mechanism 4 are distinguished
With the assembly connection of splined shaft 2 and driving the splined shaft 2；
Fig. 1 is into Fig. 5, and what Fig. 1 illustrated the gear-rack drive rotary table lifts drive mechanism and each part
Installation relation in casing；Fig. 2 illustrates the revolution driving for the gear-rack drive rotary table that can eliminate gap automatically
The installation relation of mechanism, anti-backlash mechanism and each part；Fig. 3 illustrates the installation positioning principle and two racks of anti-backlash mechanism
Installation relation；Fig. 4 illustrates the installation relation of lead screw shaft；Fig. 5 illustrates the installation relation of plane scroll spring.
As shown in figure 1, the lifting drive mechanism 4 mainly includes the first cylinder sleeve 41, piston rod 42, closure 43 and thrust ball
Bearing 44.First cylinder sleeve 41 is fixedly connected on by screw on the inwall of casing 3；Piston is machined with piston rod 42, is arranged in
First cylinder sleeve 41, front end is contacted by thrust ball bearing 44 with splined shaft 2；Closure 43 is located at the rear end of piston rod 42, passes through
Screw is fixedly connected on the first cylinder sleeve 41；When leading to oil in the lower section cavity of piston rod 42, piston rod 42, piston rod 42 can be promoted
By promoting thrust ball bearing 44 splined shaft 2 is done lift motion upwards, the platform 1 that pushes the work forward of splined shaft 2 does lift motion.
As shown in Figure 1, 2, rotary motion mechanism 5 mainly include gear shaft 51, rack 52, the second cylinder sleeve 53, left end cap 54,
Left piston 55, the 3rd cylinder sleeve 56, right end cap 57 and right piston 58.Rack 52 is by the first rack 521 and the second rack 522 two
Rack superposition is constituted, and is engaged with the gear on gear shaft 51；First rack 521 and the thickness of the second rack 522 are equal, and the first tooth
Bar 521, the thickness sum of the second rack 522 are equal with the gear width of gear shaft 51.Second cylinder sleeve 53, the 3rd cylinder sleeve 56 are coaxial
In casing 3.Left piston 55, right piston 58 are separately mounted to the left and right ends of rack, are placed in cylinder sleeve.Left end cap 54,
Right end cap 57 is fixedly connected on the left and right ends of casing 3, and is fixedly connected with cylinder sleeve respectively by screw.Left end cap 54, left work
The 55, second cylinder sleeve 53 of plug constitutes the left chamber of oil cylinder together, and right end cap 57, right piston 58, the 3rd cylinder sleeve 56 constitute oil cylinder together
Right chamber.Gear shaft 51 is linked together by spline engagement with splined shaft 2, and workbench 1 is fixedly connected on splined shaft 2 by screw
On.When the left chamber of oil cylinder leads to oil, left piston 55 can be promoted it is moved along a straight line to the right, so as to promote the He of the first rack 521
Second rack 522 is moved right together, and rack is moved by band movable gear shaft 51 turning anticlockwise that engages with gear shaft 51, is made
Splined shaft 2 and workbench 1 do turning anticlockwise motion together；With should oil cylinder right chamber logical oil when, can promote right piston 58 to
A left side moves along a straight line, so as to promote 522 liang of racks of the first rack 521 and the second rack together to left movement, two racks by with
Clockwise gyration of the engagement of gear shaft 51 with movable gear shaft 51, makes splined shaft 2 and workbench 1 do revolution clockwise together
Motion.It is achieved thereby that the positive and negative gyration of the 180 degree of workbench 1.
As shown in Figures 2 to 5, anti-backlash mechanism 6 mainly includes lead screw shaft 61, bearing spider 62, needle bearing 63, nut
64th, nut bearing 65, plane scroll spring 66.The two ends of lead screw shaft 61 are arranged on bearing spider 62 by needle bearing 63, axle
Bearing 62 is held to be fixed by screws on the second rack 522.Lead screw shaft 61 matches with nut 64, and nut 64 passes through nut bearing 65
On the first rack 521, the two ends of plane scroll spring 66 are separately fixed at the rack of lead screw shaft 61 and second by screw
On 522.Lead screw shaft 61, bearing spider 62, needle bearing 63, nut 64, nut bearing 65, plane scroll spring 66 are all positioned over
In the cavity that first rack 521 and the second rack 522 are internally formed.When there is drive gap between the wheel and rack of gear shaft 51
When, plane scroll spring 66 can give lead screw shaft 61 1 rotational torques, drive lead screw shaft 61 to rotate an angle.So that leading screw
Occurs the relative displacement of an axial direction between axle 61 and nut 64, because nut 64 is separately mounted to the first rack with lead screw shaft 61
521 and 522 liang of racks of the second rack on, the relative displacement of an axial direction also occurs between two racks, that is, realizes the first rack
521 and the side set of the second rack 522, increase equivalent transverse tooth thickness, so as to eliminate the transmission between the wheel and rack 52 on gear shaft 51
Gap.
Claims (3)
1. a kind of gear-rack drive rotary table, including workbench and casing, it is characterised in that：The workbench passes through solid
Surely the splined shaft connected and the casing assembly connection, and by the splined shaft support limit；
The rotary table also includes lifting drive mechanism, rotary motion mechanism and anti-backlash mechanism；
Described rotary motion mechanism, lifting drive mechanism and anti-backlash mechanism is installed in the casing, and described revolution is driven
Motivation structure and lifting drive mechanism are respectively with the splined shaft assembly connection and driving the splined shaft；
The rotary motion mechanism mainly includes gear shaft, rack, the second cylinder sleeve, left end cap, left piston, the 3rd cylinder sleeve, right-hand member
Lid and right piston；
The gear shaft is linked together by spline engagement with the splined shaft；The rack is by the first rack and the second tooth
Two rack superpositions of bar are constituted, and are engaged with the gear on the gear shaft；Described the second cylinder sleeve and the 3rd cylinder sleeve is co-axially mounted
In the casing；Described left piston and right piston is separately mounted to the left and right ends of the rack, is respectively placed in described
In two cylinder sleeves and the 3rd cylinder sleeve；Described left end cap and right end cap are fixedly connected on the casing left and right ends respectively, and point
It is not fixedly connected with second cylinder sleeve and the 3rd cylinder sleeve；Described left end cap, left piston, the second cylinder sleeve constitute oil cylinder together
Left chamber, described right end cap, right piston, the 3rd cylinder sleeve constitute the right chamber of oil cylinder together；
The anti-backlash mechanism includes lead screw shaft, bearing spider, needle bearing, nut, nut bearing and plane scroll spring；It is described
Lead screw shaft, bearing spider, needle bearing, nut, nut bearing and plane scroll spring be all positioned over first rack and
In the cavity being internally formed of second rack；The lead screw shaft two ends are arranged on the bearing spider by the needle bearing
On, the bearing spider is fixed on second rack；Described lead screw shaft matches with nut, and the nut passes through the spiral shell
Female bearing is arranged on first rack；The two ends of the plane scroll spring are separately fixed at the lead screw shaft and described
On two racks.
2. gear-rack drive rotary table as claimed in claim 1, it is characterised in that：First rack and described
Two spline thicknesses are equal, and the first described rack and the thickness sum of the second rack and the gear width phase of the gear shaft
Deng.
3. gear-rack drive rotary table as claimed in claim 1 or 2, it is characterised in that：Lifting drive mechanism master
To include the first cylinder sleeve, piston rod, closure and thrust ball bearing；
First cylinder sleeve is fixedly connected on by screw on the inwall of the casing；Piston is machined with the piston rod, is worn
Located at first cylinder sleeve, front end is contacted by the thrust ball bearing with the splined shaft；The closure is located at the work
The rear end of stopper rod, is fixedly connected on first cylinder sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510395566.3A CN104942609B (en) | 2015-07-08 | 2015-07-08 | A kind of gear-rack drive rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510395566.3A CN104942609B (en) | 2015-07-08 | 2015-07-08 | A kind of gear-rack drive rotary table |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104942609A CN104942609A (en) | 2015-09-30 |
| CN104942609B true CN104942609B (en) | 2017-09-26 |
Family
ID=54157952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510395566.3A Expired - Fee Related CN104942609B (en) | 2015-07-08 | 2015-07-08 | A kind of gear-rack drive rotary table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104942609B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665763B (en) * | 2016-03-31 | 2018-08-17 | 重庆工商职业学院 | A kind of deep hole boring mechanical arm cutting segment structure |
| CN105642928B (en) * | 2016-03-31 | 2018-10-09 | 重庆工商职业学院 | A kind of boring mechanical arm cutting tool for boring structure |
| CN105642942B (en) * | 2016-03-31 | 2018-10-09 | 重庆工商职业学院 | A kind of boring processing three-shaft linkage mechanical arm |
| CN105598505B (en) * | 2016-03-31 | 2018-10-09 | 重庆工商职业学院 | A kind of deep hole boring single shaft motor machine arm |
| CN109129009B (en) * | 2018-11-06 | 2024-03-22 | 南京众得利自动化机械有限公司 | Quick indexing device for changing hydraulic indexing |
| CN112975504A (en) * | 2021-03-02 | 2021-06-18 | 沈阳机床股份有限公司 | Crankshaft positioning mechanism of numerical control end face milling and center hole drilling machine tool |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5189923A (en) * | 1992-01-24 | 1993-03-02 | Bimba Manufacturing Company | Antibacklash rack assembly |
| JP2002188708A (en) * | 2000-12-21 | 2002-07-05 | Lintec Corp | Gear mechanism and printing device |
| CN2580208Y (en) * | 2002-11-02 | 2003-10-15 | 湖北汽车工业学院 | Automatic compensation mechanism for gear teeth side gap |
| JP2004340367A (en) * | 2003-04-25 | 2004-12-02 | Thk Co Ltd | Hypoid gear device |
| CN2755358Y (en) * | 2004-10-29 | 2006-02-01 | 哈尔滨量具刃具集团有限责任公司 | Transmission backlash eliminating device of helical gears |
| KR20070092018A (en) * | 2006-03-08 | 2007-09-12 | 주식회사 만도 | Automatic clearance compensator of support york for use in rack and pinion type steering apparatus |
| CN203035890U (en) * | 2012-08-26 | 2013-07-03 | 潍坊工商职业学院 | Novel gear clearance eliminating mechanism |
| CN203130966U (en) * | 2013-01-31 | 2013-08-14 | 常州机电职业技术学院 | Tooth clearance adjusting device of gear and rack steering engine |
| CN204413726U (en) * | 2015-02-02 | 2015-06-24 | 芜湖瑞精机床有限责任公司 | The gap eliminating gear device that a kind of numerical control drilling machine unit head is upper and lower |
-
2015
- 2015-07-08 CN CN201510395566.3A patent/CN104942609B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN104942609A (en) | 2015-09-30 |
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