CN201304583Y - Reverse gap elimination and micro-adjusting mechanism of rotary worktable precision transmission system - Google Patents
Reverse gap elimination and micro-adjusting mechanism of rotary worktable precision transmission system Download PDFInfo
- Publication number
- CN201304583Y CN201304583Y CNU2008201565930U CN200820156593U CN201304583Y CN 201304583 Y CN201304583 Y CN 201304583Y CN U2008201565930 U CNU2008201565930 U CN U2008201565930U CN 200820156593 U CN200820156593 U CN 200820156593U CN 201304583 Y CN201304583 Y CN 201304583Y
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- eccentric shaft
- bivalve
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Abstract
The utility model relates to a reverse gap elimination and micro-adjusting mechanism of rotary worktable precision transmission system in the field of advanced manufacture technique. The reverse gap elimination and micro-adjusting mechanism comprises an eccentric shaft, a left lobe of a double-lobe gear, a right lobe of a double-lobe gear, a waist hole, a clamping screw, a micro-adjusting screw hole, and a dial plate, wherein the waist hole is formed on the left lobe of the double-lobe gear; the left part of the eccentric shaft is sheathed in the waist hole, and the right part of the eccentric shaft is sheathed in the right lobe of the double-lobe gear; the micro-adjusting screw hole is formed on the right end of the eccentric shaft; the clamping screw is screwed from the left side of the double-lobe gear to connect the left lobe and the right lobe of the double-lobe gear as a whole; and the dial plate is fixed on the right end of the right lobe of the double-lobe gear. Through the adjustment of the eccentric shaft and screw thread clamping, the reverse gap elimination and micro-adjusting mechanism can adjust and clamp the gap and a preset pressure to achieve the high-precision requirement of five-axis machine tool.
Description
Technical field
The utility model relates to the device in a kind of advanced manufacturing technology field, specifically, what relate to is a kind of elimination and fine adjustment mechanism of rotary table precision transmission system backlass.
Background technology
NC machine tool feed system is owing to often be in the frequent break-in state of load, the mismachining tolerance when backlash can cause feeding reverse, thereby and produce reverse dead band and influence machining accuracy, so must take measures to eliminate the gap in the gear drive.
Find through literature search prior art, the article that Wu Liqun delivered on the fifth phase P187-P188 at " lathe and hydraulic pressure " in 2005 " removing method in gear drive gap ", this article has mainly been introduced elimination (or reducing) method in gaps such as straight spur gear transmission, cylindrical helical gear drive, Bevel Gear Transmission, and has introduced the characteristics of method.Wherein the pad adjustment method in the helical gear transmission is: wide gear meshes with the web gear of two identical numbers of teeth simultaneously, and web gear is connected with axle through flat key, does not have relatively each other and turns round.Be added with the pad that thickness is t between helical gear.Use nut screwing clamping, make the helix of two gears produce dislocation, two flank of tooth are close to the elimination gap with the flank of tooth of wide gear respectively thereafter.Its weak point is will use the pad of different-thickness for different gear clearances, adjusts cumbersomely, and can't adjust precompression.Also have a kind of axial stage clip to adjust method in the article, helical gear slides on the axle with key, does not have each other to relatively rotate.Helical gear simultaneously and the wide gear engagement, nut is regulated butterfly spring, makes the flank of gear be adjacent to the teeth groove left and right sides of wide gear respectively, has eliminated the gap.This method energy automatic compensation gap, but precompression, poor rigidity do not had.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art, a kind of elimination and fine adjustment mechanism of rotary table precision transmission system backlass are provided, regulate and the screw thread clamping by eccentric shaft, realization reaches the high-precision requirement of five-axis machine tool to gap, and the adjustment and the clamping of precompression.
The utility model is achieved through the following technical solutions, and comprising: eccentric shaft, bivalve gear left side lobe, the right lobe of bivalve gear, waist hole, pinching screw, fine setting screw, dial.Annexation is: open on the lobe of a bivalve gear left side in the waist hole, the eccentric shaft left half axle is enclosed within the waist hole, the eccentric shaft right axle shaft is enclosed within the right lobe of bivalve gear, the fine setting screw is opened at the eccentric shaft right-hand member, pinching screw screws in from bivalve gear left side, bivalve gear left side lobe and the right lobe of bivalve gear are connected together and can screw, dial is fixed on the right lobe right-hand member of bivalve gear.
Principle of the present utility model is, when turn right trim screw, eccentric shaft rotates slightly, swing takes place and slides in the hole in left-hand axis, driving left side gear rotates slightly, two lobe gear generation relative angular displacements of right both sides when they mesh with wide gear, have just been eliminated the gear backlass.Should guarantee to be in the frictional force self-locking state during eccentric shaft design, can adjust accurately gear clearance and precompression like this with the gear contact-making surface.
The utility model is regulated by eccentric shaft and screw thread clamps, and realizes the gap, reaches the adjustment and the clamping of precompression, reaches the high-precision requirement of five-axis machine tool.The utility model can accurately be eliminated under the situation of known gap, and clamps by screw thread, obtains needed pre-clamping force.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is for being the angular adjustment schematic diagram
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated: present embodiment is being to implement under the prerequisite with technical solutions of the utility model; provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, the elimination and the fine adjustment mechanism of the rotary table precision transmission system backlass that present embodiment is related comprise: bivalve gear left side lobe 1, the right lobe 2 of bivalve gear, fine setting screw 3, eccentric shaft right axle shaft 4, pinching screw 5, eccentric shaft left half axle 6, waist hole 7, dial 8.Its annexation is: open at bivalve gear left side lobe 1 in waist hole 7, eccentric shaft left half axle 6 is enclosed within the waist hole 7, eccentric shaft right axle shaft 4 is enclosed within the right lobe 1 of bivalve gear, fine setting screw 3 is opened at eccentric shaft right-hand member 4, dial 8 is fixed on right lobe 2 right-hand members of bivalve gear, pinching screw 5 screws in from bivalve gear left side lobe 1, bivalve gear left side lobe 1 and the right lobe 2 of bivalve gear are connected together and can screw.
In the present embodiment, described fine setting screw 3 is hexagonal screws in the fine setting.
The concrete work and the use of present embodiment: after the user measures the gear backlass, calculate the fine setting screw 3 required anglecs of rotation, the angle index of pressing on the dial 8 is finely tuned interior hexagonal screw 3 with the spanner turn, make it reach required angle, at this moment eccentric shaft right axle shaft 4 rotates slightly, drive left half axle 6 swings, and in waist hole 7 lower slider, make the lobe 1 little rotation of a bivalve gear left side, relative angular displacement takes place in the right lobe 2 of the bivalve gear left side lobe 1 of both sides and bivalve gear, when they with axle system in other gears engaged the time, just eliminated the gear backlass.Should guarantee to be in the frictional force self-locking state during eccentric shaft design, can adjust accurately gear clearance and precompression like this with waist hole 7 contact-making surfaces.
If bivalve gear left side lobe 1 radius is R, left side rotating shaft center is r to the distance of the alignment of shafts, and gear clearance is Δ t, and the micrometer adjusting screw adjusting angle is α, and the eccentric throw of eccentric shaft is a.There is following relation between them:
Like this, just can be after measuring gear backlass Δ t, calculated angle that micrometer adjusting screw need rotate.
Claims (2)
1, a kind of elimination of rotary table precision transmission system backlass and fine adjustment mechanism, it is characterized in that comprising: eccentric shaft, bivalve gear left side lobe, the right lobe of bivalve gear, waist hole, pinching screw, fine setting screw, dial, wherein: the waist hole is located on the lobe of a bivalve gear left side, the eccentric shaft left half axle is enclosed within the waist hole, the eccentric shaft right axle shaft is enclosed within the right lobe of bivalve gear, the fine setting screw is located at the eccentric shaft right-hand member, pinching screw screws in from bivalve gear left side, bivalve gear left side lobe and the right lobe of bivalve gear are connected together, and dial is fixed on the right lobe right-hand member of bivalve gear.
2, the elimination of rotary table precision transmission system backlass according to claim 1 and fine adjustment mechanism is characterized in that, described fine setting screw is a hexagonal screw in the fine setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201565930U CN201304583Y (en) | 2008-12-05 | 2008-12-05 | Reverse gap elimination and micro-adjusting mechanism of rotary worktable precision transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201565930U CN201304583Y (en) | 2008-12-05 | 2008-12-05 | Reverse gap elimination and micro-adjusting mechanism of rotary worktable precision transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201304583Y true CN201304583Y (en) | 2009-09-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201565930U Expired - Fee Related CN201304583Y (en) | 2008-12-05 | 2008-12-05 | Reverse gap elimination and micro-adjusting mechanism of rotary worktable precision transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201304583Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106886228A (en) * | 2017-04-29 | 2017-06-23 | 吉林大学 | A kind of 3 Shaft angle micro-adjusting mechanisms |
| CN108119642A (en) * | 2016-12-30 | 2018-06-05 | 上海丰禾精密机械有限公司 | For the fixed gear-driven tooth space eliminating mechanism of centre-to-centre spacing and its removing method |
-
2008
- 2008-12-05 CN CNU2008201565930U patent/CN201304583Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119642A (en) * | 2016-12-30 | 2018-06-05 | 上海丰禾精密机械有限公司 | For the fixed gear-driven tooth space eliminating mechanism of centre-to-centre spacing and its removing method |
| CN106886228A (en) * | 2017-04-29 | 2017-06-23 | 吉林大学 | A kind of 3 Shaft angle micro-adjusting mechanisms |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100830 Address after: 201100 room 2003, building 555, Dongchuan Road, Minhang District, Shanghai, China Patentee after: Shanghai Putuo Numerical Control Technology Co., Ltd. Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Co-patentee before: Shanghai Putuo Numerical Control Technology Co., Ltd. Patentee before: Shanghai Jiao Tong University |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20151205 |
|
| EXPY | Termination of patent right or utility model |