CN206377211U - Worm gear device - Google Patents
Worm gear device Download PDFInfo
- Publication number
- CN206377211U CN206377211U CN201621240382.6U CN201621240382U CN206377211U CN 206377211 U CN206377211 U CN 206377211U CN 201621240382 U CN201621240382 U CN 201621240382U CN 206377211 U CN206377211 U CN 206377211U
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- worm screw
- worm
- drive part
- tooth
- worm gear
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Abstract
The utility model provides a kind of worm gear device, it includes worm and worm wheel, worm gear device also includes keeping drive device and the midway drive part for driving worm screw, worm screw can be rotationally coupled to midway drive part relative to midway drive part, keep drive device to be configured to that worm screw and midway drive part are remained and be relatively fixed, and keep drive device to be further configured to make worm screw rotate relative to midway drive part.According to worm gear device of the present utility model, when the rotation direction of midway drive part and worm screw changes, keep drive device that worm screw can be driven to rotate predetermined angular relative to midway drive part, so that the position in the gap between the tooth of worm screw and the tooth of worm gear changes, eliminate or reduce the gap between the tooth of worm screw and the tooth of worm gear, so as to reduce the impulsive force when rotation direction of worm screw changes between the tooth of worm screw and the tooth of worm gear, the abrasion of worm screw is reduced.
Description
Technical field
The utility model is related to mechanical transmission fields, more particularly to a kind of worm gear device.
Background technology
In machine driving, worm gear device is widely used due to that can provide big speed reducing ratio.
Figure 1A and Figure 1B show a kind of worm gear device according to prior art.Reference picture 1A and 1B, the worm gear snail
Lever apparatus includes little gear 1, idler gear 2, worm screw 3 and worm gear 4.Little gear 1 drives idler gear 2 as driving gear.In
Between gear 2 diameter and the number of teeth be significantly greater than the diameter and the number of teeth of little gear 1.Idler gear 2 and worm screw 3 are integrally formed or solid
It is fixed to arrive together, and with consistent central axis.When idler gear 2 is rotated, worm screw 3 also rotates around its center axis.Snail
The tooth 41 of wheel 4 is engaged with the spiral helicine tooth 31 on worm screw 3, so as to drive worm gear 4 to rotate by worm screw 3.Worm gear 4 is used as canine tooth
Wheel, the diameter and the number of teeth of its diameter and the number of teeth than idler gear 2 is big.
There is gap g between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4, especially when worm screw 3 inverts.Gap g will
Cause the abrasion of worm screw 3 and worm gear 4, particularly worm screw 3.When the rotation direction of worm screw 3 changes, due to gap g's
In the presence of the generation impact between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4.
Utility model content
The purpose of this utility model is when the rotation direction of worm screw changes, and reduces the tooth of worm screw and the tooth of worm gear
Between impulsive force, reduce worm screw abrasion.
The utility model can use but be not limited to following proposal.
A kind of worm gear device, it includes worm and worm wheel, and the worm gear device also includes keeping drive device
With the midway drive part for driving the worm screw, the worm screw can be rotationally coupled to institute relative to the midway drive part
Midway drive part is stated, the holding drive device is configured to remain the worm screw and the midway drive part relatively
Fix, and the holding drive device is further configured to make the worm screw rotate relative to the midway drive part.
Preferably, the holding drive device is configured to when the midway drive part drives the worm screw to rotate, institute
State holding drive device the worm screw and the midway drive part are remained and be relatively fixed to rotate together, it is described to keep driving
When the rotation direction that device is also configured to the midway drive part driving worm screw changes, the holding driving dress
Put the driving worm screw and rotate predetermined angular relative to the midway drive part, so that the tooth of the worm screw and the worm gear
The position in the gap between tooth changes.
Preferably, the rotation direction for keeping drive device to be configured to drive the worm screw in the midway drive part
When changing, the holding drive device drives the worm screw to rotate predetermined angular relative to the midway drive part, described
Gap between the tooth of the tooth of worm screw and the worm gear becomes positioned at the axially another of the tooth from the axial side positioned at corresponding tooth
Side.
Preferably, the holding drive device includes oil controlling valve and variable cam timing mechanism.
Preferably, an axial end portion for the worm screw is provided with multiple radial projections, the inside of the midway drive part
Multiple radial direction elongated slots are provided with, the multiple radial projection is inserted into the multiple radial direction elongated slot, the holding drive device
It is configured to drive the radial projection to be rotated relative to the radial direction elongated slot and can be by the radial projection and institute
State radial direction elongated slot and remain and be relatively fixed.
Preferably, circumference of the multiple radial projection along the worm screw is evenly distributedly from the one of the worm screw
Axial end portion is radially projecting, and the midway drive part is additionally provided with the centre bore inserted for the axial end portion of the worm screw, institute
Multiple radial direction elongated slots are stated from the centre bore to radial outside to extend.
Preferably, the circumferential width of the radial direction elongated slot is more than the circumferential width of corresponding radial projection so that：Described
When midway drive part is rotated in a first direction, the radial projection and the first side wall on front side of the rotation direction of the radial direction elongated slot
Against；When the midway drive part drives the rotation direction of the worm screw to change, the holding drive device drives institute
State radial projection to rotate relative to the radial direction elongated slot, make the radial projection and the radial direction elongated slot and the first side wall
Relative second sidewall against.
Preferably, the midway drive part is idler gear.
Preferably, the worm gear device also includes the little gear or cingulum or chain for being used to drive the idler gear.
According to worm gear device of the present utility model, drive device is kept to be configured to worm screw and midway drive
Part, which is remained, to be relatively fixed, and keeps drive device to be further configured to make worm screw rotate relative to midway drive part.From
And, when the rotation direction of midway drive part and worm screw changes, i.e. will in the rotation direction of midway drive part and worm screw
When changing, keep drive device that worm screw can be driven to rotate predetermined angular relative to midway drive part, so that worm screw
The position in the gap between tooth and the tooth of worm gear changes, that is, between eliminating or reducing between the tooth of worm screw and the tooth of worm gear
Gap, so that the impulsive force when rotation direction for reducing worm screw changes between the tooth of worm screw and the tooth of worm gear, reduction worm screw
Abrasion.
Brief description of the drawings
Figure 1A is the stereogram for showing the worm gear device according to prior art；Figure 1B is the axial direction for being showing along worm screw
The side view of Figure 1A of observation worm gear device.
Fig. 2A is the stereogram for showing the worm gear device according to an embodiment of the present utility model；Fig. 2 B are figures
The side view of 2A worm gear device.
Fig. 3 A and 3B show a state according to worm gear device of the present utility model, wherein, little gear edge figure
In 3A rotationally clockwise.
Fig. 4 A and 4B show another state according to worm gear device of the present utility model, wherein, show small tooth
When the rotation direction of wheel changes, worm screw changes relative to the rotation of idler gear and gap g position.
Description of reference numerals
1 little gear, 2 idler gears, 3 worm screws, the tooth of 31 worm screws, 4 worm gears, the tooth of 41 worm gears, g gaps, 22 centre bores, 23
Elongated slot, 32 axial end portions, 33 projections
Embodiment
Illustrative embodiments of the present utility model are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only
How to implement the utility model, rather than exhaustive all feasible sides of the present utility model for teaching those skilled in the art
Formula, without in limitation scope of the present utility model.
Reference picture 2A and 2B, according to the worm gear device of an embodiment of the present utility model include little gear 1, in
Between gear 2, worm screw 3 and worm gear 4.Little gear 1, idler gear 2, worm screw 3 and the worm gear 4 of present embodiment have and Figure 1A and 1B
In little gear 1, idler gear 2, worm screw 3 structure similar with worm gear 4, the worm and gear of present embodiment is mainly explained below
The difference of device and the worm gear device in Figure 1A and 1B.
The idler gear 2 of present embodiment and worm screw 3 are not integrally formed, moreover, worm screw 3 is moveably mounted to centre
Gear 2.Specifically, on the direction around idler gear 2 and the axis direction of worm screw 3, worm screw 3 can be relative to idler gear
2 rotate.
In a kind of specific but nonrestrictive example, centre bore 22 is centrally formed with idler gear 2, it is multiple
Circumference of the elongated slot 23 of willow leaf shape along centre bore 22 is evenly distributed.An axial end portion 32 for worm screw 3 is inserted into center tooth
In the centre bore 22 of wheel 2, the projections 33 of multiple willow leaf shapes is arranged at the circumferential equal of the axial end portion 32 and axially end 32
It is distributed evenly.Multiple projections 33 are inserted correspondingly into multiple elongated slots 23.The diameter of axial end portion 32 is slightly less than centre bore 22
Internal diameter, (radial direction) of projection 33 highly and (circumference) width be less than (radial direction) of elongated slot 23 highly with (circumference) width so that snail
Bar 3 can be rotated around its center axis relative to idler gear 2.
The manner of execution of the worm gear device according to present embodiment is briefly described below.Snail is driven in idler gear 2
When the steering of bar 3 changes, first, the relative position of regulation idler gear 2 and worm screw 3, i.e. make worm screw 3 relative to centre
Gear 2 is rotated, to reduce the gap between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4, more specifically, making tooth 31 and the snail of worm screw 3
Gap between the tooth 41 of wheel 4 is located at ad-hoc location.Second, reversely activate little gear 1.3rd, center tooth is driven by little gear 1
Wheel 2 and worm screw 3.Finally, worm gear 4 is driven by worm screw 3.
Illustrate little gear 1 from rotating clockwise to when rotating counterclockwise change below with reference to Fig. 3 A to Fig. 4 B, this practicality
The action of new worm gear device, i.e. the tooth 31 and worm gear of rotation relation and worm screw 3 between idler gear 2 and worm screw 3
The change in the gap between 4 tooth 41.
Fig. 3 A and 3B show a state according to worm gear device of the present utility model, wherein, little gear 1 is along figure
In 3A rotationally clockwise, idler gear 2 is along rotating in an anti-clockwise direction in Fig. 3 A, idler gear 2 and worm screw 3 it is relative
Position is fixed, and worm screw 3 drives worm gear 4 along rotating in an anti-clockwise direction in Fig. 3 B.Now, the tooth 41 of the tooth 31 of worm screw 3 and worm gear 4
Between gap g be located at Fig. 3 B worm screw 3 corresponding tooth left side, i.e. the place side of idler gear 2.
In little gear 1 from being rotated in the clockwise direction to the transformation of rotation in the counterclockwise direction shown in Fig. 4 A in Fig. 3 A
When, first, worm screw 3 is independently activated with little gear 1 and idler gear 2, make worm screw 3 along along Fig. 3 A rotationally clockwise,
As shown in Figure 4 A, the projection 33 of worm screw 3 from the position shown in dotted arrow be moved to Fig. 4 A in projection 33 position, so,
Gap g between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4 becomes the right side shown in Fig. 4 B from the left side in Fig. 3 B.It is, making
Gap g between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4 is from positioned at the axial side (Fig. 3 A) where the idler gear 2 of tooth 31
Become the axial opposite side (Fig. 4 A) opposite with the place side of idler gear 2 positioned at tooth 31.
After gap g positions between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4 change, make idler gear 2 and worm screw 3
Relative position fix, little gear 1 by from along Fig. 3 A becoming rotationally clockwise along the counter clockwise direction in Fig. 4 A turn
It is dynamic.Now, idler gear 2 along along Fig. 4 A rotationally clockwise, worm screw 3 drives worm gear 4 along the clockwise direction in Fig. 4 B
Rotate, the gap g between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4 is maintained at the right side of the corresponding tooth of Fig. 4 B worm screw 3, i.e.,
The opposite side of the place side of idler gear 2.
Therefore, worm gear device of the present utility model also includes holding drive device (not shown), holding driving dress
Put for making worm screw 3 relative to the rotation predetermined angular of idler gear 2, so that gap g position changes, in addition, the holding drives
Worm screw 3 and idler gear 2 can also be remained and be rotated together under the driving of little gear 1 by device.
In a typical and nonrestrictive example, the holding drive device can include oil controlling valve (OCV) and can
Become cam timing (VCT) mechanism.OCV and VCT technologies are highly developed in the automotive industry, and VVT (VVT) can lead to
Cross the realization of OCV and VCT technologies.In the utility model, OCV and VCT technologies have been used in worm gear device first, with
Change the position in the gap between the tooth of worm gear and the tooth of worm screw.
For example, when little gear 1 from rotating in the counterclockwise direction in Fig. 4 A is rotated in the clockwise direction change into Fig. 3 A
During change, keep drive device driving worm screw 3 relative to idler gear 2 along rotating in an anti-clockwise direction in Fig. 4 A, i.e. projection 33 from
The position shown in dotted arrow that position shown in Fig. 4 A is moved in Fig. 4 A.So, the position shown in gap g from Fig. 4 B is changed to
Position shown in Fig. 3 B.Then, keep drive device that worm screw 3 and idler gear 2 are remained and be relatively fixed, little gear 1 is along figure
Shown in 3A rotationally clockwise, idler gear 2 is along rotating in an anti-clockwise direction in Fig. 3 A, and worm gear 4 is along the inverse time in Fig. 3 B
Pin direction is rotated, and gap g is maintained at the left side of the corresponding tooth of worm screw 3, i.e. the place side of idler gear 2.
It should be appreciated that can determine that via appropriate calculating and/or simple experiment makes the snail needed for the g change in location of gap
The rotational angle of bar 3.
As shown in Figure 3 A and 4 A, preferably but without limitation, the circumference along idler gear of elongated slot 23 and projection 33
Width meet following condition：When idler gear 2 is rotated in the counterclockwise direction as shown in Figure 3A, projection 33 is against idler gear
The side wall in (downstream) on front side of the rotation direction of 2 elongated slot 23；It is rotated in the clockwise direction as shown in Figure 4 A in idler gear 2
When, projection 33 is against the side wall on front side of the rotation direction of the elongated slot 23 of idler gear 2.So, as shown in Figure 4 A, when the phase of projection 33
Rotate and just stop when being rotated for elongated slot 23, when projection 33 abuts the side wall of elongated slot 23.It therefore, it can further by elongated slot 23
Projection 33 is limited relative to elongated slot 23, i.e. rotational angle of the worm screw 3 relative to idler gear 2.
Can be when the rotation direction of worm screw 3 changes, i.e., in worm screw 3 according to worm gear device of the present utility model
Rotation direction will change before, gap g position is changed, this eliminates or at least reduce and cause
The gap of impact between the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4.When changing so as to reduce the rotation direction of worm screw 3, worm screw
Impact between 3 tooth 31 and the tooth 41 of worm gear 4, reduces the tooth 31 of the tooth 31 of worm screw 3 and the tooth 41 of worm gear 4, particularly worm screw 3
Abrasion.Worm gear 4 is smoothly driven by worm screw 3.
The utility model is not limited to above-mentioned embodiment.Those skilled in the art under the teaching of the description of the present application when
It can so be variously modified and modification, these change and modification is also included within the range of the utility model.
(1) part of driving worm screw 3 is not limited to little gear 1 and idler gear 2.For example, can be driven by cingulum, chain etc.
Idler gear 2.Idler gear 2 can be directly driven by motor, bent axle etc., now, therefore idler gear 2, can be gone back without tooth
Idler gear in the application can be referred to as midway drive part.
(2) quantity of the projection 33 of the elongated slot 23 of idler gear 2 and worm screw 3 is not limited to 4 in figure, its can for 2,
3 or more than 4.
(3) idler gear 2 and the fit structure of worm screw 3 are not limited to shown in Fig. 2A to Fig. 4 B, as long as can be driven via holding
Dynamic device makes worm screw 3 be rotated relative to idler gear 2, and worm screw 3 and idler gear 2 is relatively fixed (i.e. one after rotation
Rise and rotate).
(4) the holding drive device of the application is not limited to by oil controlling valve (OCV) and variable cam timing (VCT) mechanism structure
Into the holding drive device can be made up of appropriate magnetic valve, cylinder, oil hydraulic cylinder etc..
Claims (9)
1. a kind of worm gear device, it includes worm and worm wheel, it is characterised in that the worm gear device also includes keeping
Drive device and the midway drive part for driving the worm screw,
The worm screw can be rotationally coupled to the midway drive part relative to the midway drive part,
The holding drive device is configured to that the worm screw and the midway drive part are remained and be relatively fixed, and
The holding drive device is further configured to make the worm screw rotate relative to the midway drive part.
2. worm gear device according to claim 1, it is characterised in that
The holding drive device is configured to when the midway drive part drives the worm screw to rotate, the holding driving dress
Put and the worm screw and the midway drive part remained and be relatively fixed to rotate together,
The rotation direction for keeping drive device to be also configured to the midway drive part driving worm screw changes
When, the holding drive device drives the worm screw to rotate predetermined angular relative to the midway drive part, so that the snail
The position in the gap between the tooth of the tooth of bar and the worm gear changes.
3. worm gear device according to claim 2, it is characterised in that
It is described to keep drive device to be configured to when the midway drive part drives the rotation direction of the worm screw to change,
The holding drive device drives the worm screw to rotate predetermined angular, the tooth of the worm screw and institute relative to the midway drive part
The gap between the tooth of worm gear is stated to become to be located at the axial opposite side of the tooth from the axial side positioned at corresponding tooth.
4. worm gear device according to claim 2, it is characterised in that
The holding drive device includes oil controlling valve and variable cam timing mechanism.
5. worm gear device according to claim 1, it is characterised in that
An axial end portion for the worm screw is provided with multiple radial projections, and the midway drive part is internally provided with multiple footpaths
To elongated slot, the multiple radial projection is inserted into the multiple radial direction elongated slot,
The holding drive device is configured to drive the radial projection to rotate relative to the radial direction elongated slot and energy
It is enough that the radial projection and the radial direction elongated slot are remained and be relatively fixed.
6. worm gear device according to claim 5, it is characterised in that
Circumference of the multiple radial projection along the worm screw is evenly distributedly from one axial end portion edge of the worm screw
It is radially projecting,
The midway drive part be additionally provided with for the worm screw axial end portion insert centre bore, the multiple radial direction elongated slot from
The centre bore extends to radial outside.
7. worm gear device according to claim 6, it is characterised in that
The circumferential width of the radial direction elongated slot is more than the circumferential width of corresponding radial projection so that：
When the midway drive part is rotated in a first direction, the radial projection and the rotation direction front side of the radial direction elongated slot
The first side wall against；
When the midway drive part drives the rotation direction of the worm screw to change, the holding drive device driving is described
Radial projection is rotated relative to the radial direction elongated slot, makes the radial projection and the radial direction elongated slot and the first side wall phase
To second sidewall against.
8. worm gear device according to any one of claim 1 to 7, it is characterised in that
The midway drive part is idler gear.
9. worm gear device according to claim 8, it is characterised in that
The worm gear device also includes the little gear or cingulum or chain for being used to drive the idler gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240382.6U CN206377211U (en) | 2016-11-14 | 2016-11-14 | Worm gear device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240382.6U CN206377211U (en) | 2016-11-14 | 2016-11-14 | Worm gear device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206377211U true CN206377211U (en) | 2017-08-04 |
Family
ID=59403028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621240382.6U Active CN206377211U (en) | 2016-11-14 | 2016-11-14 | Worm gear device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206377211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695485A (en) * | 2018-12-11 | 2019-04-30 | 江苏三能动力总成有限公司 | A kind of changing air valve phase control system |
-
2016
- 2016-11-14 CN CN201621240382.6U patent/CN206377211U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695485A (en) * | 2018-12-11 | 2019-04-30 | 江苏三能动力总成有限公司 | A kind of changing air valve phase control system |
| CN109695485B (en) * | 2018-12-11 | 2021-02-19 | 江苏三能动力总成有限公司 | Variable valve phase control system |
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