CN204387290U - A kind of planar envelope internal messing worm and worm gear automatic gap eliminating device - Google Patents
A kind of planar envelope internal messing worm and worm gear automatic gap eliminating device Download PDFInfo
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- CN204387290U CN204387290U CN201520006790.4U CN201520006790U CN204387290U CN 204387290 U CN204387290 U CN 204387290U CN 201520006790 U CN201520006790 U CN 201520006790U CN 204387290 U CN204387290 U CN 204387290U
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- Prior art keywords
- worm
- internal messing
- worm screw
- worm gear
- outer gearing
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Abstract
The utility model discloses a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device, comprise an internal messing worm screw, one realize power input outer gearing worm screw, internal messing worm screw center is provided with pilot hole, outer gearing worm screw is axially movably installed in pilot hole by axially locating device, the engaging tooth of outer gearing worm screw is positioned at internal messing worm screw inside, internal messing worm screw inside be provided with several and each while the worm gear that is meshed with internal messing worm screw and outer gearing worm screw, each worm gear is provided with a pto＝power take-off and to extend to internal messing worm screw outside.The utility model realizes the precision drive automatically eliminating planar envelope internal messing worm tooth side clearance, by adopting the form of outer gearing worm screw and the transmission of internal messing worm combination, the turn error produced in backlash between effective elimination worm and worm gear and worm and worm gear clockwise and anticlockwise process, effectively raises the transmission accuracy of device.
Description
Technical field
The utility model relates to a kind of Worm and Worm Gear Driving technical field, particularly a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device.
Background technique
Worm and Worm Gear Driving device is as one of gear-driven type, dynamic force and motion between the main diaxon in order to transmit spatial intersecting, usual diaxon alternate angle is 90 °, and due to its compact structure, transmission speed ratio is large, noise is little, worm gear Driving Torque is large etc., and feature is widely used in machinery as speed reducer and accurate transmission mechanism.But, along with the development of productivity and industrial technology, create existing worm drive technology and can not meet the contradiction that reality produces.Particularly in accurate transmission mechanism, more and more higher to the requirement of precision indexing and accurate retarding machine, demand is also increasing.Mainly concentrate on about the research of precise worm transmission in the worm drive adopting traditional mesh form at present, in internal messing form, do not reach the ability of elimination backlash automatically.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device automatically can eliminating the precision of back lash.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of planar envelope internal messing worm and worm gear automatic gap eliminating device, comprises an internal messing worm screw, and an outer gearing worm screw realizing power input, internal messing worm screw center is provided with pilot hole, outward
Engages worm is axially movably installed in pilot hole by axially locating device, nibbling of outer gearing worm screw
Closing tooth, to be positioned at internal messing worm screw inner, internal messing worm screw inside be provided with several and each while with
The worm gear that internal messing worm screw and outer gearing worm screw are meshed, each worm gear is provided with a Power output
Axle and to extend to internal messing worm screw outside.
Preferably, the engagement side that is meshed of internal messing worm screw and outer gearing worm and wheel Surface of action
Cheng Wei:
x
2"＝u
y
2"＝-r
b+vsinβ
z
2"＝vcosβ
Wherein: A is the centre distance of worm and wheel, β is helix angle; i
21for velocity ratio,
for the corner of worm screw,
for the corner of worm gear, r
bfor Base radius, α is the crossed axis angle of worm gear rotary middle spindle and worm screw rotary middle spindle, and u, v are respectively the coordinate origin o be connected with worm gear teeth
3relative to the space fixed coordinate system o be connected with worm gear
2x, y coordinate value, Σ
1'(o
1', x
1', y
1', z
1') and Σ
2 "(o
2 ", x
2 ", y
2 ", z
2 ") be respectively the space operation frame that worm screw is connected mutually with instrument generatrix.
Preferably, internal messing worm screw is class bowl-type planar double enveloping worm, and outer gearing worm screw is planar double enveloping worm, and internal messing worm screw, outer gearing worm screw are formed by same tooth surface equation envelope, and its shape is taken to the different piece of double enveloping.
Preferably, worm gear has 2, and symmetrical, and two pto＝power take-offs prolong opposite direction and stretch out internal messing worm screw outside.
Preferably, worm gear has 4, and lays respectively at two the orthogonal diameter two ends of internal messing worm screw near the rim of a bowl, and four pto＝power take-offs counterclockwise stretch out planar envelope internal messing worm screw outside, and adjacent two pto＝power take-offs are axially mutually vertical.
Preferably, pto＝power take-off is fixedly connected on worm gear center, and perpendicular to worm gear axial cross section.
Preferably, pilot hole inside is provided with truncated cone shape cavity, and cavity small-caliber end is inner near internal messing worm screw, one end away from outer gearing worm meshing tooth is provided with keyway, worm shaft near keyway is thread spindle, axially locating device is sheathed between thread spindle and internal messing worm screw, and is fixed by nut.
Preferably, axially locating device comprises the positioning head matched with truncated cone shape cavity, and positioning head head apical grafting is in the small-bore inwall of cavity, and afterbody connects one end of elastic element, and the other end connection fixing base, is provided with packing ring between fixed base and nut.
Preferably, the small-bore place of cavity is provided with an endoporus, and endoporus aperture is greater than outer gearing worm shaft radial cross section diameter.
Preferably, elastic element is adjustment spring.
The working principle of the planar envelope internal messing worm and worm gear automatic gap eliminating device that the utility model provides is as follows:
The keyway end of outer gearing worm screw connects the output terminal of motor, rotate under the drive of motor, the internal messing worm screw be arranged on outer gearing worm screw is also rotated thereupon, worm gear also rotates under the common driving of internal messing worm screw and outer gearing worm screw, under the effect of axially locating device, the mesh tooth face of outer gearing worm screw and a lateral tooth flank of worm gear keep in touch, the mesh tooth face of internal messing worm screw and the opposite side flank of tooth of worm gear keep in touch, work as worm screw, when there are wearing and tearing in the flank of tooth of worm gear in transmission, adjustment spring in axially locating device will promote positioning head and move axially along outer gearing worm shaft, thus promote internal messing worm screw moving axially along outer gearing worm screw, internal messing worm screw is remained with the flank of tooth of outer gearing worm and worm wheel contact, automatically backlash compensation is carried out, realize worm geared automatic anti-backlash.
Compared with prior art, the beneficial effects of the utility model are:
1, a kind of worm gear outputting power of planar envelope internal messing worm and worm gear automatic gap eliminating device that the utility model provides drives internal messing worm drive by outer gearing worm screw, two worm screws realize inputting the power of worm gear jointly, therefore the utility model has larger bearing capacity.
2, the utility model is owing to adopting the anti-backlash mechanism of axially locating device between inside and outside engages worm, when there are wearing and tearing in worm and worm gear, automatically internal messing worm screw can be promoted along internal messing worm shaft to moving, the worm and worm gear flank of tooth is made to remain contact, carry out backlash compensation, thus effectively solve the backlash after worm and worm gear tooth surface abrasion and eliminate problem, ensure that transmission accuracy.
3, the utility model is owing to adopting the mode of internal messing worm screw and the transmission simultaneously of outer gearing worm screw, therefore this device has the plurality of advantages of outer gearing worm screw and internal messing worm screw concurrently simultaneously, not only can meet the needs many operating loads being carried out to transmission simultaneously, and structure is simple, compact, transmission efficiency is high, be applied to and need many operating loads when carrying out the occasion of transmission simultaneously, compared with common worm drive, this transmission device volume is little, lightweight, precision is high, easy to assembly, larger saves production cost.
4, in the utility model because worm gear adopts symmetrical layout, in transmission process, two symmetrical worm gears carry out relative or contrary transmission, so not only can reduce the axial force on worm screw, and can noise decrease, make transmission more steady, especially when worm gear be 2 or 4 time transmission time more steady.
5, in the utility model, the pto＝power take-off of worm screw power input shaft and worm gear is nonopiate interlaced arrangement, and each pto＝power take-off is all at the gyration center of each worm gear, makes that structure is compacter, transmission is more steady.
In sum, the utility model provides a kind of a kind of accurate transmission mechanism realizing automatically eliminating planar envelope internal messing worm tooth side clearance, this kind of structural type not only ensure that the normal work of transmission and good lubrication, and by adopting the form of outer gearing worm screw and the transmission of internal messing worm combination, effectively can eliminate the turn error produced in backlash between worm and worm gear and worm and worm gear clockwise and anticlockwise process, the effective transmission accuracy improving device.Also make this device have the outstanding meshing performance of part of internal messing worm screw and outer gearing worm screw concurrently simultaneously, and this device adopts being arranged symmetrically with of many worm gears, reduce worm screw axial force, make transmission more steady, noise is lower, compact structure, single worm screw input 1 ~ 4 even more worm gear can be realized export, transmission efficiency is high, meets the transmission demand of many operating loads simultaneously, all has broad application prospects in fields such as aerospace field, naval vessel, optical instrument, measurements.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the utility model cross-sectional view;
Fig. 2 is the utility model China and foreign countries engages worm structural representations;
Fig. 3 is that in the utility model, worm gear is the cross-sectional view of 2;
Fig. 4 is that in the utility model, worm gear is the cross-sectional view of 4;
Fig. 5 is the frame schematic diagram of mesh tooth face theory deduction in the utility model;
Fig. 6 is the auxiliary frame schematic diagram of mesh tooth face theory deduction in the utility model.
Embodiment
Embodiment 1:
As Figure 1-3, a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device that the utility model provides, comprises an internal messing worm screw 1, outer gearing worm screw 4, for automatically adjusting the axially locating device of worm and worm gear back lash, 2 worm gears 2,5 be meshed with internal messing worm screw 1 and outer gearing worm screw 4 and the pto＝power take-off 3,6 combined with worm gear 2,5 respectively simultaneously.
Power input shaft of the present utility model is outer gearing worm screw 4 (as shown in Figure 2), engages worm 4 is provided with keyway 4-3 away from engagement increment outside, be connected with the pto＝power take-off of motor by coupling, rotation by driven by motor, simultaneously outer gearing worm screw 4 is processed into the form of thread spindle 4-4 near the worm shaft of keyway end 4-3, fixing for axially locating device.
Axially locating device comprises nut 7, packing ring 8, spring fixed seat 9, adjustment spring 10, positioning head 11; The positioning head 11 of axially locating device is frustoconic shape structure, be enclosed within outer gearing worm screw 4 thread section axle 4-4, positioning head 11 is arranged in the frustoconic shape hole of internal messing worm screw 1 setting simultaneously, adjustment spring 10 is arranged between corresponding spring fixed seat 9 and positioning head 11, its one end contacts with spring seat 9, the other end contacts with positioning head 11, axially locating device is fixed on outer gearing worm screw 4 by nut 7, and adjust outer gearing worm screw 4 and the relative position of internal messing worm screw 1 by nut 7, packing ring 8 is installed between nut 7 and spring seat 9.
In the planar envelope internal messing worm and worm gear automatic gap eliminating device that the utility model provides, internal messing worm screw 1 and outer gearing worm screw 4 are planar double enveloping worm, and two worm screws are formed by same tooth surface equation envelope, the shape of inside and outside engages worm is taken to the different piece of double enveloping, as shown in Figure 5, Figure 6, its tooth surface equation is:
x
2"＝u
y
2"＝-r
b+vsinβ
z
2"＝vcosβ
Wherein:
A is the centre distance of worm and wheel;
β is helix angle;
R
bfor Base radius;
α is the crossed axis angle of worm gear rotary middle spindle and worm screw rotary middle spindle;
I
21for velocity ratio, namely
Wherein ω
1for the angular velocity vector of worm screw, ω
2for the angular velocity vector of worm gear,
for the corner of worm screw,
for the corner of worm gear;
As shown in Fig. 5 Fig. 6, Σ in figure
1(o
1, x
1, y
1, z
1) and Σ
2(o
2, x
2, y
2, z
2) be respectively worm screw and be connected mutually and the space fixed coordinates frame (being called principal coordinate) of instrument generatrix;
Σ
1'(o
1', x
1', y
1', z
1') and Σ
2 "(o
2 ", x
2 ", y
2 ", z
2 ") be respectively the space operation frame that worm screw is connected mutually with instrument generatrix, (x
1', y
1', z
1') be the space operation frame o be connected mutually with worm screw
1'corresponding coordinate value, (x
2 ", y
2 ", z
2 ") be the space operation frame o be connected mutually with instrument generatrix
2 "corresponding coordinate value;
Σ
2'(o
2', x
2', y
2', z
2') for convenience of frame conversion transition frame;
According to the theory of engagement, introduce frame Σ at contact points place
4(o
p, e
1, e
2, n);
Σ
3(o
3, x
3, y
3, z
3)=(o
3, u, 0, system of coordinates v) be connected with worm gear teeth, u, v are respectively the coordinate origin o be connected with worm gear teeth
3relative to the space fixed coordinate system o be connected with worm gear
2x, y coordinate value;
According to the system of coordinates set up and tooth surface equation, the concrete shape of worm screw is by worm gear corner
parameter is determined, wherein outer gearing worm screw
span be-π/5 ~ π/5, internal messing worm screw
span be 4 π/7, π/5 ~ 8.
In the present embodiment, as shown in Figure 1, internal messing worm screw 1 is provided with round platform nibs suitable with axially locating device positioning head 11, internal messing worm screw 1 and the adjacent position of round platform nibs are also provided with endoporus 16 simultaneously, for the assembling with outer gearing worm screw 1 and worm gear 2,5, and endoporus 16 size is slightly larger than outer gearing worm screw 4 radial dimension, so that the assembling of whole backlash eliminating equipment.
In the present embodiment, engaging tooth 1-1,1-2 of internal messing worm screw 1 are arranged on the inside engaging tooth of internal messing worm screw, the engaging tooth of outer gearing worm screw 4-1,4-2 is arranged on the outer gearing tooth of outer gearing worm screw, and the corresponding teeth of each worm gear 2,5 engages with inside engaging tooth 1-1,1-2 of internal messing worm screw 1 and the outside flank of tooth 4-1,4-2 of outer gearing worm screw 4 respectively; α is the crossed axis angle of worm gear rotary middle spindle and worm screw rotary middle spindle, when α=0, and the worm shaft in this device and the orthogonal thereto alternative form of worm-gear output shaft; When α ≠ 0, the worm shaft in this device and worm-gear output shaft are nonopiate alternative form, and each pto＝power take-off is all at the gyration center of each worm gear.
Embodiment 2:
As shown in Figure 4, preferably the quantity of turbine is 4 in the present embodiment, and be respectively turbine 2,5,13,15, the quantity of corresponding pto＝power take-off is also 4, is respectively pto＝power take-off 3,6,12,14.
Above-described embodiment midplane envelope internal messing worm screw automatic gap eliminating device can realize power and export (as Fig. 3 by twin worm input 2 or 4 worm gears simultaneously; shown in Fig. 4); certain 2 and 4 worm gears are the optimal ways herein in embodiment, and the output of 1 or 3 or 5 or more worm gear is also in protection domain of the present utility model.
The following detailed description of working principle of the present utility model:
The keyway end of outer gearing worm screw 1 is connected with the pto＝power take-off of motor by coupling, rotate under the drive of motor, the internal messing worm screw 4 be arranged on outer gearing worm screw 1 is also rotated thereupon, worm gear 2, 5, 13, 15 also rotate under the common driving of internal messing worm screw 1 and outer gearing worm screw 4, under the effect of axially locating device, the engaging tooth 1-1 of outer gearing worm screw 1, 1-2 and worm gear 2, 5, 13, the right flank of 15 keeps in touch, the engaging tooth 4-1 of internal messing worm screw 4, 4-2 and worm gear 2, 5, 13, the left flank of 15 keeps in touch, work as worm screw, when there are wearing and tearing in the flank of tooth of worm gear in transmission, adjustment spring 10 in axially locating device will promote positioning head 11 and move axially along outer gearing worm screw 4 axle, thus promote internal messing worm screw 1 moving axially along outer gearing worm screw 4, make internal messing worm screw 1 and outer gearing worm screw 4 and worm gear 2, 5, 13, the flank of tooth of 15 remains contact, automatically backlash compensation is carried out, realize worm geared automatic anti-backlash.
Above-mentioned mode of execution is intended to illustrate that the utility model can be professional and technical personnel in the field and realizes or use; modifying to above-mentioned mode of execution will be apparent for those skilled in the art; therefore the utility model includes but not limited to above-mentioned mode of execution; any these claims or specification of meeting describes; meet and principle disclosed herein and novelty, the method for inventive features, technique, product, all fall within protection domain of the present utility model.
Claims (10)
1. a planar envelope internal messing worm and worm gear automatic gap eliminating device, it is characterized in that, comprise an internal messing worm screw, one realize power input outer gearing worm screw, described internal messing worm screw center is provided with pilot hole, described outer gearing worm screw is axially movably installed in described pilot hole by axially locating device, the engaging tooth of described outer gearing worm screw is positioned at described internal messing worm screw inside, described internal messing worm screw inside be provided with several and each while the worm gear that is meshed with described internal messing worm screw and described outer gearing worm screw, each described worm gear is provided with a pto＝power take-off and extends to described internal messing worm screw outside.
2. planar envelope internal messing worm and worm gear automatic gap eliminating device according to claim 1, is characterized in that, the mesh equation that described internal messing worm screw and described outer gearing worm screw are meshed with described worm gear Surface of action is:
x
2"＝u
y
2"＝-r
b+vsinβ
z
2"＝vcosβ
Wherein: A is the centre distance of worm and wheel, β is helix angle; i
21for velocity ratio,
for the corner of worm screw,
for the corner of worm gear, r
bfor Base radius, α is the crossed axis angle of worm gear rotary middle spindle and worm screw rotary middle spindle, and u, v are respectively the coordinate origin o be connected with worm gear teeth
3relative to the position fixing system o be connected with worm gear
2x, y coordinate value, ∑
1'(o
1', x
1', y
1', z
1') and ∑
2 "(o
2 ", x
2 ", y
2 ", z
2 ") be respectively the space operation frame that worm screw is connected mutually with instrument generatrix.
3. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to claim 1, it is characterized in that, described internal messing worm screw is bowl-type planar double enveloping worm, described outer gearing worm screw is planar double enveloping worm, described internal messing worm screw, described outer gearing worm screw are formed by same tooth surface equation envelope, and its shape is taken to the different piece of double enveloping.
4. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to claim 2, it is characterized in that, described worm gear has 2, and symmetrical, and two described pto＝power take-offs prolong axial opposed direction and stretch out described internal messing worm screw outside.
5. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to claim 2, it is characterized in that, described worm gear has 4, and lay respectively at two the orthogonal diameter two ends of described internal messing worm screw near the rim of a bowl, four described pto＝power take-offs counterclockwise stretch out described planar envelope internal messing worm screw outside, and pto＝power take-off described in adjacent two is axially mutually vertical.
6. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to any one of claim 1-4, it is characterized in that, described pto＝power take-off is fixedly connected on described worm gear center, and perpendicular to described worm gear axial cross section.
7. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to any one of claim 1-4, it is characterized in that, described pilot hole inside is provided with truncated cone shape cavity, and described cavity small-caliber end is inner near described internal messing worm screw, one end away from described outer gearing worm meshing tooth is provided with keyway, worm shaft near described keyway is thread spindle, and described axially locating device is sheathed between described thread spindle and described internal messing worm screw, and is fixed by nut.
8. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to any one of claim 6, it is characterized in that, described axially locating device comprises the positioning head matched with described truncated cone shape cavity, described positioning head head apical grafting is in the small-bore inwall of described cavity, afterbody connects one end of elastic element, the other end connection fixing base, is provided with packing ring between described fixed base and described nut.
9. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to any one of claim 6, it is characterized in that, the small-bore place of described cavity is provided with an endoporus, and described endoporus aperture is greater than described outer gearing worm shaft radial cross section diameter.
10. a kind of planar envelope internal messing worm and worm gear automatic gap eliminating device according to any one of claim 7, is characterized in that, described elastic element is adjustment spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006790.4U CN204387290U (en) | 2015-01-06 | 2015-01-06 | A kind of planar envelope internal messing worm and worm gear automatic gap eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006790.4U CN204387290U (en) | 2015-01-06 | 2015-01-06 | A kind of planar envelope internal messing worm and worm gear automatic gap eliminating device |
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| Publication Number | Publication Date |
|---|---|
| CN204387290U true CN204387290U (en) | 2015-06-10 |
Family
ID=53360012
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520006790.4U Expired - Fee Related CN204387290U (en) | 2015-01-06 | 2015-01-06 | A kind of planar envelope internal messing worm and worm gear automatic gap eliminating device |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675980A (en) * | 2015-01-06 | 2015-06-03 | 西华大学 | Automatic plane-enveloping internal-meshing worm and worm gear clearance elimination device |
| CN110121610A (en) * | 2016-12-29 | 2019-08-13 | 成都中良川工科技有限公司 | A kind of transmission decelerating device |
-
2015
- 2015-01-06 CN CN201520006790.4U patent/CN204387290U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675980A (en) * | 2015-01-06 | 2015-06-03 | 西华大学 | Automatic plane-enveloping internal-meshing worm and worm gear clearance elimination device |
| CN104675980B (en) * | 2015-01-06 | 2017-02-22 | 西华大学 | Automatic plane-enveloping internal-meshing worm and worm gear clearance elimination device |
| CN110121610A (en) * | 2016-12-29 | 2019-08-13 | 成都中良川工科技有限公司 | A kind of transmission decelerating device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20170106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |