CN106468311B - Worm gear mechanism, power steering apparatus and automobile - Google Patents
Worm gear mechanism, power steering apparatus and automobile Download PDFInfo
- Publication number
- CN106468311B CN106468311B CN201510514752.4A CN201510514752A CN106468311B CN 106468311 B CN106468311 B CN 106468311B CN 201510514752 A CN201510514752 A CN 201510514752A CN 106468311 B CN106468311 B CN 106468311B
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- worm screw
- worm
- worm gear
- bearing
- gear mechanism
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Abstract
It includes shell, worm gear, worm screw, worm screw mounting structure and soft connection component that the present invention, which provides a kind of worm gear mechanism, power steering apparatus and automobile, the worm gear mechanism, and the worm gear is fixed in the shell；The worm screw mounting structure, for the worm screw to be mounted in the shell and is allowed to engage with the worm gear；The soft connection component, for being flexibly connected the power intake of the worm screw to the motor output shaft of power steering apparatus, to allow the concentricity of motor output shaft and worm screw to adjust.Worm gear mechanism of the invention, can effectively adjust both motor output shaft and worm screw due to it is respectively not coaxial and be connected it is not coaxial caused by deflection, make to transmit steady torque between the two, avoid motor abnormality even motor damage, guarantee electrical machinery life.Simultaneously, additionally it is possible to solve the problems, such as to turn to abnormal sound.
Description
Technical field
The present invention relates to motor turning power-assisted technical fields, fill more particularly to a kind of worm gear mechanism, power steering
It sets and automobile.
Background technique
In automobile power-assisted steering system, worm gear device is commonly used as transmission parts, worm gear device has zero
The features such as number of packages mesh is few, compact-sized and transmission ratio is big.
Fig. 1 show a kind of existing worm gear mechanism, since the both ends of worm screw 7a are respectively by first bearing 6a and
Two bearing 10a are fixed on shell 9a, and the connecting flange 2a of the output shaft 11a of connecting worm 7a and motor 1a is rigid member,
So having very high requirement to the concentricity of its components and assembly, if concentricity is poor, may create the problem that
One, the abrasion for connecting spline can be aggravated and then generated to turn to abnormal sound；Second, influence the concentricity of motor, motor occur abnormal sound or
Damage.
In addition, as shown in Figure 1, existing worm gear mechanism, worm screw 7a by first bearing 6a, second bearing 10a and
Worm screw positioning plug 5a is fixed in shell 9a, and such fixed form of worm screw 7a is to rigidly fix；Meanwhile worm gear 8a is fixed on
On shell 9a, also belongs to and rigidly fixing；In this way, worm and gear meshed center distance is a steady state value.It may create the problem that in this way
One, when product initially assembles, if matching center is away from bigger than normal, product torque can be bigger than normal, causes product unqualified；Second, when
The certain mileage of automobilism or after several years has a certain amount of abrasion, to make worm and gear since worm gear is nylon material
Between engagement there is gap, and then make automobile turn to or cross deceleration strip or cross mountain peak winnow with a dustpan road surface when there is abnormal sound, directly affect
To the comfort of vehicle.
As it can be seen that existing worm gear mechanism, very high to the required precision of part, its corresponding cost is very high；Also, it is long
Phase operating abrasion can make automobile occur abnormal sound in operation, influence vehicle comfort.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the output shaft of existing worm gear mechanism its worm screw and motor
Rigid connection, is easy to cause the defect of motor damage, provides a kind of worm gear mechanism.
It is as follows that the present invention solves technical solution used by above-mentioned technical problem:
A kind of worm gear mechanism, including shell, worm gear, worm screw, worm screw mounting structure and soft connection component are provided, it is described
Worm gear is fixed in the shell, wherein
The worm screw mounting structure, for the worm screw to be mounted in the shell and is allowed to engage with the worm gear；
The soft connection component, for being flexibly connected the power intake of the worm screw to the motor of power steering apparatus
Output shaft, to allow the concentricity of motor output shaft and worm screw to adjust.
Further, the soft connection component includes the electric machine joint being socketed on motor output shaft, is socketed in the snail
The worm screw connector of the power intake of bar and the belt being connected between the electric machine joint and the worm screw connector, the belt
The power of the electric machine joint can be transmitted to the worm screw connector.
Further, the medial surface of the belt is provided with concave shaped tooth, and the lateral surface of the electric machine joint is provided with embedding
Enter the first external tooth in the concave shaped tooth, the lateral surface of the worm screw connector is provided with second in the insertion concave shaped tooth
External tooth.
Further, the belt is made of composite nylon material.
Further, the worm screw mounting structure includes first bearing, second bearing, positioning plug and plug nut, institute
It states and is formed with the first limited step and the second limited step on worm screw, the first bearing is socketed in the power output of the worm screw
On end, the positioning plug pushes down a side end face of the first bearing, and first limited step supports the first bearing
Another side end face, the plug nut thread is connected on the positioning plug, and the side of the plug nut is pressed in institute
It states on the positioning surface formed in shell, the second bearing is socketed in the tail end of the worm screw, the second limited step branch
Hold a side end face of the second bearing.
Further, through-hole is offered in the middle part of the positioning plug, the belt is placed in the through-hole.
Further, the worm screw mounting structure further includes the tune for adjusting the meshed center distance of the worm gear and worm screw
Core structure.
Further, the aligning structure includes guide holder, slide bushing, torsionspring, liner and above-mentioned first axle
It holds, the first bearing is self-aligning bearing, and the guide holder is fixed on the housing, and the slide bushing is fixed on the snail
The tail end of bar, the liner are arranged between the tail end of the worm screw and the inner ring of the second bearing, and the guide holder can
The glide direction of the slide bushing is oriented to so that its can only moving radially along the worm screw, the torsionspring
Both ends are each attached on the guide holder, and the side far from the worm gear of the torsionspring closely connects with the slide bushing
Touching, the torsionspring are separated close to the side of the worm gear with the slide bushing, the torsionspring precommpression so that
It obtains the torsionspring and draws the slide bushing towards the direction of the worm gear always.
Worm gear mechanism according to the present invention, the power intake of worm screw are flexibly connected by a soft connection component to turning
To the motor output shaft of power assisting device, since the soft connection component has certain flexibility, when motor output shaft and worm screw due to
When manufacture and assembly cause a certain amount of coaxiality deviation and influence connection between the two, this soft connection component can be effectively
Adjustment motor output shaft and both worm screws due to it is respectively not coaxial and be connected it is not coaxial caused by deflection, make to transmit between the two flat
Steady torque avoids motor abnormality even motor damage, guarantees electrical machinery life.Simultaneously, additionally it is possible to solve the problems, such as to turn to abnormal sound.
In addition, the present invention also provides a kind of power steering apparatus comprising motor and above-mentioned worm gear mechanism.
In addition, the present invention also provides a kind of automobiles comprising above-mentioned power steering apparatus.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the worm gear mechanism of existing one kind；
Fig. 2 is the structural schematic diagram for the worm gear mechanism that one embodiment of the invention provides；
Fig. 3 is the structural schematic diagram of its soft connection component of the worm gear mechanism of one embodiment of the invention offer；
Fig. 4 is the exploded view of its soft connection component of the worm gear mechanism of one embodiment of the invention offer；
Fig. 5 is the enlarged drawing in Fig. 2 at A；
Fig. 6 is the enlarged drawing in Fig. 2 at B；
Fig. 7 is the installation diagram of its aligning structure division component of the worm gear mechanism of one embodiment of the invention offer.
Appended drawing reference in Figure of description is as follows:
1, motor；111, motor output shaft；2, electric machine joint；21, the first external tooth；3, belt；4, worm screw connector；41,
Two external tooths；5, plug is positioned；51, through-hole；6, first bearing；7, worm screw；71, the first limited step；72, the second limited step；
8, worm gear；9, shell；91, positioning surface；10, second bearing；11, guide holder；12, torsionspring；13, slide bushing；14, it serves as a contrast
Pad；141, cylindrical portion；142, outer edge；15, plug nut.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
As shown in Figures 1 to 7, what one embodiment of the invention provided provides a kind of worm gear mechanism, including shell 9, snail
Wheel 8, worm screw 7, worm screw mounting structure and soft connection component, the worm gear 8 are fixed in the shell 9, wherein the worm screw peace
Assembling structure, for the worm screw 7 to be mounted in the shell 9 and is allowed to engage with the worm gear 8；The soft connection component,
For being flexibly connected the power intake of the worm screw 7 to the motor output shaft 111 of power steering apparatus, to allow motor defeated
The concentricity of shaft 111 and worm screw is adjusted.Herein, the concentricity of motor output shaft 111 and worm screw is adjusted, can be defeated by motor
Both shaft 111 and worm screws 7 are not respectively coaxial and the out-of-alignment that is connected is adjusted and realized.The power of motor 1 is exported via motor
Axis 111 and soft connection component are transferred to worm screw 7.
In the present embodiment, as shown in Figures 2 and 3, the soft connection component includes the electricity being socketed on motor output shaft 111
Machine connector 2, be socketed in the worm screw 7 power intake worm screw connector 4 and be connected to the electric machine joint 2 and the worm screw
Belt 3 between connector 4, the power that the belt 3 can export motor output shaft 111 to the electric machine joint 2 are transmitted to
The worm screw connector 4.
In the present embodiment, the medial surface of the belt 3 is provided with multiple concave shaped teeth (not indicating in figure), and the motor connects
First 2 lateral surface is provided with multiple first external tooths 21 being embedded in the concave shaped tooth, the lateral surface setting of the worm screw connector 4
There is the second external tooth 41 being embedded in the concave shaped tooth.First external tooth 21,41 quantity of the second external tooth are identical, and with the concave shaped number of teeth
It is flux matched.
In the present embodiment, belt 3 is made of composite nylon material.The selection of composite nylon material should guarantee 3 foot of belt
Enough intensity provides belt 3 certain flexibility again, guarantees there is corresponding tilt angle under defined torque.Concave shaped
The quantity of tooth is more than or equal to 20, so that electric machine joint 2 and worm screw connector 4 can have sufficiently large friction between belt 3
Power.First external tooth 21, the second external tooth 41 push down belt 3 from axial sides, to limit the axial position of belt 3.
In the present embodiment, as shown in Fig. 2, the worm screw mounting structure includes first bearing 6, second bearing 10, positioning plug
First 5 and plug nut 15, the first limited step 71 and the second limited step 72, the first bearing 6 are formed on the worm screw 7
It being socketed on the power output end of the worm screw 7, the positioning plug 5 pushes down a side end face of the first bearing 6, and described the
One limited step 71 supports another side end face of the first bearing 6, and the plug nut 15 is threaded in the positioning plug
On first 5, and the side of the plug nut 15 is pressed on the positioning surface 91 formed in the shell 9, the second bearing 10
It is socketed in the tail end of the worm screw 7, second limited step 72 supports a side end face of the second bearing 10.
In the present embodiment, as shown in figure 3, the middle part of the positioning plug 5 offers through-hole 51, the belt 3 is placed in institute
It states in through-hole 51.
In the present embodiment, as shown in figure 3, the worm screw mounting structure further includes for adjusting the worm gear 8 and worm screw 7
The aligning structure of meshed center distance.
In the present embodiment, the aligning structure include guide holder 11, slide bushing 13, torsionspring 12, liner 14 and on
The first bearing 6 stated.The guide holder 11 is fixed on the shell 9, and the slide bushing 13 is fixed on the tail of the worm screw 7
End, the liner 14 are arranged between the tail end of the worm screw 7 and the inner ring of the second bearing 10, and the guide holder 11 can
The glide direction of the slide bushing 13 is oriented to so that it can only (i.e. can only be along snail along moving radially for the worm screw 7
The engagement direction of worm and gear is mobile), the both ends of the torsionspring 12 are each attached on the guide holder 11.
As shown in FIG. 6 and 7, the side of the separate worm gear 8 of the torsionspring 12 and the slide bushing 13 are tight
The side close to the worm gear 8 of contiguity touching, the torsionspring 12 is separated with the slide bushing 13, the torsionspring 13
Precommpression is so that the torsionspring 13 draws the slide bushing 13 towards the direction of the worm gear 8 always.
In the present embodiment, slide bushing 13 is made by the higher composite resin material of wearability.
The aligning structure of above structure is needed deep groove ball bearing (the i.e. first bearing in Fig. 1 of the existing position
Self-aligning bearing 6a) is replaced with, self-aligning bearing can realize the power output end of worm screw 7 in a certain range of swing.
Slide bushing 13 can engage direction towards straight line in worm and gear along guide holder 11 under the action of torsionspring 12
Mobile, at this point, passing through, guide holder 11 can realize that worm screw 7 nibbles with respect to worm and gear by adjusting first bearing 6 (self-aligning bearing)
It closes direction and relative direction is mobile.Thus it is possible, on the one hand, since torsionspring draws slide bushing 13 towards the direction of worm gear 8 always,
After the operating abrasion for a long time of worm gear 8, slide bushing 13 drives worm screw 7 mobile towards 8 direction of worm gear, between worm gear 8 and worm screw 7
Gap is effectively compensated, and will not cause to turn to and drive a vehicle abnormal sound because worm gear is worn；On the other hand, when initial assembling process
When middle product center causes torque bigger than normal away from bigger than normal, worm screw can be made mobile relative to worm gear opposite direction, effectively have matched worm gear
The meshed center distance of worm screw, but also the machining accuracy of product can be reduced so that reducing its processing cost.
In the present embodiment, as shown in figure 4, the liner 14 includes cylindrical portion 141 and outer edge 142, the cylindrical portion 141
It is pressed between the outer peripheral surface of the tail end of the worm screw 7 and the inner ring of the second bearing 10, the outer edge 142 is pressed on institute
It states between a side end face of second bearing 10 and second limited step 72, the guide holder 11 supports the second bearing 10
Another side end face.
The power intake of worm gear mechanism according to the above embodiment of the present invention, worm screw is soft by a soft connection component
The motor output shaft that property is connected to power steering apparatus works as motor output shaft since the soft connection component has certain flexibility
When causing a certain amount of coaxiality deviation due to manufacturing and assembling with worm screw and influence connection between the two, this soft connection component
Can effectively adjust both motor output shaft and worm screw due to it is respectively not coaxial and be connected it is not coaxial caused by deflection, both make
Between transmit steady torque, avoid motor abnormality even motor damage, guarantee electrical machinery life.Simultaneously, additionally it is possible to solve to turn to different
Loud problem.
Certainly, in other embodiments, soft connection component can have other forms, if can allow for motor output shaft with
The concentricity of worm screw is adjusted, and power can be transmitted between motor output shaft and worm screw.For example, belt can be by compound Buddhist nun
Aperture is distinguished in the two sides of circular block made of imperial material, circular block, and concave shaped tooth is formed in hole, and electric machine joint, worm screw connect
Head is respectively embedded into the aperture of side.Compared to belt, the circle bulk strength made of composite nylon material is bigger.
Certainly, in other embodiments, mounting structure is also possible to the existing structure in Fig. 1, either
Mounting structure disclosed in CN203868247U.
Certainly, aligning structure is also possible to adjustment structure disclosed in CN203868247U.
In addition, one embodiment of the invention additionally provides a kind of power steering apparatus comprising motor 1 and above-mentioned worm gear snail
Linkage.
In addition, one embodiment of the invention additionally provides a kind of automobile comprising above-mentioned power steering apparatus.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of worm gear mechanism, which is characterized in that including shell, worm gear, worm screw, worm screw mounting structure, soft connection component
And aligning structure, the worm gear are fixed in the shell, wherein
The worm screw mounting structure, for the worm screw to be mounted in the shell and is allowed to engage with the worm gear；
The soft connection component, for being flexibly connected the power intake of the worm screw to the motor output of power steering apparatus
Axis, to allow the concentricity of motor output shaft and worm screw to adjust；
The aligning structure, for adjusting the meshed center distance of the worm gear and worm screw；
The worm screw mounting structure includes first bearing and second bearing, and the first bearing is socketed in the power of the worm screw
On output end, the second bearing is socketed in the tail end of the worm screw；
The aligning structure includes guide holder, slide bushing, torsionspring, liner and above-mentioned first bearing, the first axle
It holds as self-aligning bearing, the guide holder is fixed on the housing, and the slide bushing is fixed on the tail end of the worm screw, described
Liner is arranged between the tail end of the worm screw and the inner ring of the second bearing, and the guide holder can be to the slide bushing
Glide direction be oriented to so that its can only moving radially along the worm screw, the both ends of the torsionspring are each attached to institute
It states on guide holder, the side far from the worm gear of the torsionspring is in close contact with the slide bushing, the torsion bullet
The side close to the worm gear of spring is separated with the slide bushing, and the torsionspring precommpression is so that the torsionspring
Always the slide bushing is drawn towards the direction of the worm gear.
2. worm gear mechanism according to claim 1, which is characterized in that the soft connection component includes being socketed in motor
Electric machine joint on output shaft, be socketed in the worm screw power intake worm screw connector and be connected to the electric machine joint with
The power of the electric machine joint can be transmitted to the worm screw connector by the belt between the worm screw connector, the belt.
3. worm gear mechanism according to claim 2, which is characterized in that the medial surface of the belt is provided with concave shaped
Tooth, the lateral surface of the electric machine joint are provided with the first external tooth being embedded in the concave shaped tooth, the outside of the worm screw connector
Face is provided with the second external tooth being embedded in the concave shaped tooth.
4. worm gear mechanism according to claim 3, which is characterized in that the belt is made of composite nylon material.
5. worm gear mechanism according to claim 3, which is characterized in that the worm screw mounting structure further includes positioning plug
Head and plug nut are formed with the first limited step and the second limited step on the worm screw, described in the positioning plug is pushed down
One side end face of first bearing, first limited step support another side end face of the first bearing, the plug nut
It is threaded on the positioning plug, and the side of the plug nut is pressed on the positioning surface formed in the shell,
Second limited step supports a side end face of the second bearing.
6. worm gear mechanism according to claim 5, which is characterized in that offered in the middle part of the positioning plug logical
Hole, the belt are placed in the through-hole.
7. a kind of power steering apparatus, which is characterized in that including motor and worm and gear as claimed in any one of claims 1 to 6
Mechanism.
8. a kind of automobile, which is characterized in that including power steering apparatus as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514752.4A CN106468311B (en) | 2015-08-21 | 2015-08-21 | Worm gear mechanism, power steering apparatus and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514752.4A CN106468311B (en) | 2015-08-21 | 2015-08-21 | Worm gear mechanism, power steering apparatus and automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106468311A CN106468311A (en) | 2017-03-01 |
| CN106468311B true CN106468311B (en) | 2019-06-04 |
Family
ID=58229046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510514752.4A Active CN106468311B (en) | 2015-08-21 | 2015-08-21 | Worm gear mechanism, power steering apparatus and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106468311B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5139460A (en) * | 1989-11-16 | 1992-08-18 | Hoyt Iii Raymond E | Flexible couplings with end float limiting |
| WO2008088734A1 (en) * | 2007-01-17 | 2008-07-24 | The Gates Corporation | Pronged sleeve-type flexible shaft coupling |
| CN201363372Y (en) * | 2008-12-31 | 2009-12-16 | 常州市武进电缆有限公司 | Double-shaft chain-wheel electrode-free butting connector |
| CN101701609A (en) * | 2009-10-21 | 2010-05-05 | 中国农业大学 | Synchronous belt coupler |
| KR20110113979A (en) * | 2010-04-12 | 2011-10-19 | 정수용 | Chain coupling |
| CN202657093U (en) * | 2012-04-21 | 2013-01-09 | 株洲易力达机电有限公司 | Novel gapless meshing mechanism for worm gear and worm of automotive electric power steering gear |
| CN103661576A (en) * | 2012-09-24 | 2014-03-26 | 日立汽车系统转向器株式会社 | Power steering apparatus and speed reducer for power steering |
| CN203868247U (en) * | 2014-05-15 | 2014-10-08 | 比亚迪股份有限公司 | Worm and worm gear device and automobile |
-
2015
- 2015-08-21 CN CN201510514752.4A patent/CN106468311B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5139460A (en) * | 1989-11-16 | 1992-08-18 | Hoyt Iii Raymond E | Flexible couplings with end float limiting |
| WO2008088734A1 (en) * | 2007-01-17 | 2008-07-24 | The Gates Corporation | Pronged sleeve-type flexible shaft coupling |
| CN201363372Y (en) * | 2008-12-31 | 2009-12-16 | 常州市武进电缆有限公司 | Double-shaft chain-wheel electrode-free butting connector |
| CN101701609A (en) * | 2009-10-21 | 2010-05-05 | 中国农业大学 | Synchronous belt coupler |
| KR20110113979A (en) * | 2010-04-12 | 2011-10-19 | 정수용 | Chain coupling |
| CN202657093U (en) * | 2012-04-21 | 2013-01-09 | 株洲易力达机电有限公司 | Novel gapless meshing mechanism for worm gear and worm of automotive electric power steering gear |
| CN103661576A (en) * | 2012-09-24 | 2014-03-26 | 日立汽车系统转向器株式会社 | Power steering apparatus and speed reducer for power steering |
| CN203868247U (en) * | 2014-05-15 | 2014-10-08 | 比亚迪股份有限公司 | Worm and worm gear device and automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106468311A (en) | 2017-03-01 |
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