CN102072280A - Transmission device - Google Patents
Transmission device Download PDFInfo
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- CN102072280A CN102072280A CN2009102522221A CN200910252222A CN102072280A CN 102072280 A CN102072280 A CN 102072280A CN 2009102522221 A CN2009102522221 A CN 2009102522221A CN 200910252222 A CN200910252222 A CN 200910252222A CN 102072280 A CN102072280 A CN 102072280A
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- turbine
- transmission device
- worm screw
- gear
- worm
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Abstract
The invention discloses a transmission device which comprises a worm gear and a worm screw. The transmission device is characterized in that the worm gear is a skewed-tooth worm gear, the worm screw is provided with teeth meshed with the skewed-tooth worm gear and is provided at least two tooth sockets, and the worm gear and the worm screw are made from powder metallurgy; the transmission device disclosed by the invention has the characteristics of compact structure and great transmission ratio, and has a self-locking function under a certain condition; and the transmission device is processed and manufactured by adopting a powder metallurgy technique, thus the transmission device disclosed by the invention is simple to manufacture, and has a low material cost.
Description
Technical field
The present invention relates to a kind of transmission device, be specifically related to a kind of transmission device of turbine and worm, especially be fit to the use on the electric wheelchair.
Background technique
In order to realize providing thoughtful treatment to patient and handicapped personnel, there has been development and Design in present wheelchair manufacturer electric wheelchair can make things convenient for user's free operant and action, fully satisfies patient and the constant personage's of action trip and daily life.
In electric wheelchair, by motor driven gear mechanism, wheelchair is gone on a journey and all kinds of adjustings thereby drive, therefore, the gear mechanism parts that in electric wheelchair, are absolutely necessary, and to the technical requirements of gear mechanism than higher.The stability of working gear, the structure of gear and flexibility all can have influence on the performance of electric wheelchair.In addition, the precision of gear also can have influence on the life-span of electric wheelchair, and as the parts that work is frequent, there is direct influence in the life-span of the life-span of gear to electric wheelchair.
For example application number is " 00805564.5 ", patent application for " transmission device that is used for wheelchair " by name, a kind of transmission device that is used for wheelchair is disclosed, it is installed on the support of said wheelchair, be used to select manual mode and maneuver mode to drive said wheelchair, it is characterized in that: said transmission device comprises: a gear unit, be installed on the said wheelchair, and be used to drive said wheelchair; One clamping unit is used for said gear unit is fixed on said wheelchair; One switches the unit, is used in manual mode and maneuver mode said wheelchair being switched; Wherein, said gear unit comprises: with the drive roller that accelerator links to each other with retarder, the motor on the both sides of accelerator wherein and retarder and enclosure links to each other, and this drive roller is used to drive two-wheeled; One controller links to each other with a battery with said motor, an electromotor control circuit unit by circuit, is used to regulate said gear unit; Wherein, said switching unit comprises: a fixing clamp, shell assembling by said clamping unit and said gear unit, and have a locking projection, this locking projection are locked in the locking aperture of the fixed component on the support of said wheelchair or from this locking aperture release; One lock, its top in said fixing clamp links to each other with first and second springs with the bottom, and by upwards pulling of one handle; Said locking projection is outstanding at said lock two-side elastic respectively, and is locked into the locking aperture of said fixed component or from this locking aperture release; One first slide fastener, it links to each other with button, button is resiliently mounted on the said handle by the 3rd spring, is used for spurring said lock by the pressing operation of said button to utilize said locking projection, thereby the drive roller of said gear unit both sides is separated with said the wheel; One ratchet is used for controlling by stopper the manipulation of said handle, and stopper is wherein linked to each other with the button of said handle by one second slide fastener.
Summary of the invention
At above-mentioned factor, the object of the present invention is to provide a kind of transmission device, can reduce the shared space of transmission device and improve velocity ratio, possess auto-lock function.
Technological scheme of the present invention is, a kind of transmission device, comprise turbine and worm screw, it is characterized in that, described turbine is the helical teeth turbine, described worm screw is provided with the tooth that is meshed with the helical teeth turbine, and described worm screw is provided with at least two teeth groove, and described turbine and worm screw are turbine and the worm screw that powder metallurgy is made.
In a preferred embodiment of the present invention, described two teeth groove are symmetrical in worm screw and are provided with.
In a preferred embodiment of the present invention, described worm screw is provided with restraining groove.
In a preferred embodiment of the present invention, be provided with the axis hole that holds axle in the described turbine, and the screens groove is arranged between axis hole and turbine.
In a preferred embodiment of the present invention, be provided with stiffening rib in the described turbine, be provided with through hole between stiffening rib and the turbine.
In a preferred embodiment of the present invention, described through hole has six.
Transmission device provided by the invention possesses compact structure, characteristics that velocity ratio is big, has auto-lock function under certain condition; And the transmission device that the present invention discloses possesses characteristic easy for installation, rational in infrastructure; Adopt means of a powder metallurgy technique to carry out manufacturing, the transmission device manufacturing that makes the present invention disclose is simple, and the cost of material is low.
Description of drawings
Accompanying drawing 1 is an embodiment of the invention turbine and worm structural representation;
Accompanying drawing 2 is the schematic perspective view of worm screw in a preferred embodiment of the present invention;
Accompanying drawing 3 is the plan view of worm screw in a preferred embodiment of the present invention;
Accompanying drawing 4 is the schematic representation of turbine in a preferred embodiment of the present invention;
Accompanying drawing 5 is the schematic representation of speed reducer in a preferred embodiment of the present invention.
1 is worm screw among the figure, and 2 is turbine, and 11 is the tooth of worm screw, and 12 is teeth groove, and 13 is restraining groove, and 14 is joint, and 15 is the worm screw body, and 16 is the termination, and 17 is projection, and 21 is the tooth of turbine, and 22 is turbine body, and 23 are the screens groove, and 24 is axis hole, and 3 is housing.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby protection scope of the present invention is made more explicit defining so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that.
In the embodiment of the invention, be that example illustrates design and the application of the present invention about gear and speed reducer with the speed reducer of electric wheelchair, but the present invention is not limited to this, can be applied in as on the products such as electric tool, electric bicycle.
Shown in Fig. 1,2,3 and 4, turbine 2 and worm screw 1 carry out joggleword among the figure, turbine 2 comprises turbine body 22 and is positioned at the tooth 21 of turbine, the tooth 21 of turbine is that the mode with helical teeth is arranged on the turbine, be provided with output shaft in the axis hole 24 of turbine 2, output shaft and turbine 2 position by screens groove 23.
The tooth 11 that worm screw 1 comprises worm screw body 15 and is positioned at the worm screw on the worm screw body, on the worm screw body, also be provided with restraining groove 13, end worm screw 1 is the termination 16 of worm screw, and termination 16 is provided with projection 17, is the joint 14 of worm screw in the other end of worm screw.
Referring to Fig. 5, speed reducer comprises housing 3 among the figure, turbine 2 and worm screw 1, turbine 2 is positioned at housing 3 inside, and worm screw 1 part is positioned at housing 3, and a part is positioned at outside the housing 3, thereby make things convenient for being connected of worm screw 1 and motor, in turbine 2, cooperate with it and carry out transmission output by output shaft.
In embodiments of the present invention, turbine and worm adopts the manufacturing of metal powder metallurgy technology, and simple to operate, stable performance and cost are low.
Because transmission device is the sliding friction transmission, meeting in service produces more heat, makes thermal expansion generation difference between each part of speed reducer and the sealing, thereby forms the gap at each fitting surface, and lubricating oil easily causes leakage owing to the rising of temperature is thinning.Therefore can buy or make by oneself some special tools, when dismounting and installation speed reducer parts, avoid knocking as far as possible with other instruments such as hammers; More when gear changing, worm and gear, select genuine part as far as possible for use and change in pairs; During the assembling output shaft, note tolerance fit; Use antitack agent or red lead oil guard hollow shaft, prevent to wear and tear and get rusty or fitting surface incrustation, difficult dismounting during maintenance.
Worm gear generally adopts tin bronze, and the worm screw material of pairing hardens to HRC4555 with 45 steel, or 40Cr hardens HRC5055 after worm grinder is ground to roughness Ra0.8 μ m.It is very slow to wear and tear when speed reducer normally moves, and some speed reducer can use more than 10 years.If the rate of wear is very fast, will consider whether type selecting is correct, whether overload operation, and reasons such as the material of worm and gear, assembly quality or Environmental Conditions.
Helical speed reduction gear is novel speed reduction gearing, adopt optimization, module combinations system advanced person's design concept, have that volume is little, in light weight, transmitting torque is big, starting steadily, the velocity ratio classification is meticulous, can connect selection with multiple mounting point arbitrarily according to customer requirements.Gear adopts the high-quality high strength alloy steel, and case hardening is handled, and bearing capacity is strong, and is durable in use.
Common spur gear enters engagement simultaneously along the facewidth, thereby produces the impact shock noise, and transmission is not steady.Cylindrical helical gear drive then is better than straight-tooth, and can gather tight centre distance and be used for high-speed overload.
Helical gear advantage:
1 because Surface of action is by little, and---greatly---little, engagement is steady, impacts for a short time, and noise is little;
2 big bearing capacitys improve life-span and stationarity;
The little undercut that is difficult for of 3zmin, volume is little.
The helical gear worm reduction gear adopts motor direct connection form, and structure adds the first-stage worm gear worm drive for the one-level helical gear.Be output as shaft-mountedly, have six kinds of basic installation forms.But clockwise and anticlockwise running, helical gear adopts the hard flank of tooth, running steadily, bearing capacity is big, it is big that operating ambient temperature-10 ℃～40 ℃, this product and like product ratio have the velocity variations scope, compact structure, characteristics such as easy for installation.Can be widely used in the reducing gear of various machinery such as metallurgy, mine, lifting, light industry, chemical industry, transportation, building.
The helical gear worm reduction gear adopts motor direct connection form, and structure adds the first-stage worm gear worm drive for the one-level helical gear.Be output as shaft-mountedly, have six kinds of basic installation forms.But clockwise and anticlockwise running, helical gear adopts the hard flank of tooth, running steadily, bearing capacity is big, it is big that operating ambient temperature-10 ℃～40 ℃, this product and like product ratio have the velocity variations scope, compact structure, characteristics such as easy for installation.Can be widely used in the reducing gear of various machinery such as metallurgy, mine, lifting, light industry, chemical industry, transportation, building.
Helical gear not exclusively is a spiral gear, should, spiral gear is two helical gear engagement systems, is transmitted the direction difference of power by them in the space and distinguishes.
Worm-gear speed reducer is that a kind of compact structure, velocity ratio are big, has the gearing of auto-lock function under certain condition.And the helical teeth turbine and worm transmission device that the present invention relates to possesses characteristic easy for installation, rational in infrastructure.It is to adopt a helical gear reducer at the worm type of reduction gearing input end, and the retarder of formation can obtain low-down output speed, has higher efficient than single-stage worm reduction gear, and vibrate little, noise is low.
The above; it only is the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (6)
1. a transmission device comprises turbine and worm screw, it is characterized in that, described turbine is the helical teeth turbine, described worm screw is provided with the tooth that is meshed with the helical teeth turbine, and described worm screw is provided with at least two teeth groove, and described turbine and worm screw are turbine and the worm screw that powder metallurgy is made.
2. transmission device according to claim 1 is characterized in that, described two teeth groove are symmetrical in worm screw and are provided with.
3. transmission device according to claim 2 is characterized in that described worm screw is provided with restraining groove.
4. transmission device according to claim 3 is characterized in that, is provided with the axis hole that holds axle in the described turbine, and the screens groove is arranged between axis hole and turbine.
5. transmission device according to claim 4 is characterized in that, is provided with stiffening rib in the described turbine, is provided with through hole between stiffening rib and the turbine.
6. transmission device according to claim 5 is characterized in that, described through hole has six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102522221A CN102072280A (en) | 2009-11-25 | 2009-11-25 | Transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102522221A CN102072280A (en) | 2009-11-25 | 2009-11-25 | Transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102072280A true CN102072280A (en) | 2011-05-25 |
Family
ID=44030958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102522221A Pending CN102072280A (en) | 2009-11-25 | 2009-11-25 | Transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102072280A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102871806A (en) * | 2012-10-03 | 2013-01-16 | 王秋华 | Electric walking replacing chair |
| CN108201489A (en) * | 2018-03-24 | 2018-06-26 | 苏州市职业大学（苏州开放大学） | It is a kind of can self-locking safe wheelchair |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117465A1 (en) * | 1983-02-24 | 1984-09-05 | Thyssen Industrie Ag | Enveloping worm gearing with spur wheel |
| CN2079685U (en) * | 1990-02-14 | 1991-06-26 | 中国迅达电梯有限公司北京电梯厂 | Cylinder worm gearing with involute enveloping flank profile |
| CN2635987Y (en) * | 2003-09-11 | 2004-08-25 | 北京兴达奇机电技术有限责任公司 | Speed reducer |
| US20050028627A1 (en) * | 2003-08-04 | 2005-02-10 | Yakov Fleytman | Gear reduction unit |
| CN1622429A (en) * | 2003-11-28 | 2005-06-01 | 马渊马达株式会社 | Gear unit of small motor |
| US20080087124A1 (en) * | 2004-05-27 | 2008-04-17 | Yakov Fleytman | Enveloping speed reducer |
| CN201531561U (en) * | 2009-11-25 | 2010-07-21 | 常熟市迅达粉末冶金有限公司 | Transmission device |
-
2009
- 2009-11-25 CN CN2009102522221A patent/CN102072280A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117465A1 (en) * | 1983-02-24 | 1984-09-05 | Thyssen Industrie Ag | Enveloping worm gearing with spur wheel |
| CN2079685U (en) * | 1990-02-14 | 1991-06-26 | 中国迅达电梯有限公司北京电梯厂 | Cylinder worm gearing with involute enveloping flank profile |
| US20050028627A1 (en) * | 2003-08-04 | 2005-02-10 | Yakov Fleytman | Gear reduction unit |
| CN2635987Y (en) * | 2003-09-11 | 2004-08-25 | 北京兴达奇机电技术有限责任公司 | Speed reducer |
| CN1622429A (en) * | 2003-11-28 | 2005-06-01 | 马渊马达株式会社 | Gear unit of small motor |
| US20080087124A1 (en) * | 2004-05-27 | 2008-04-17 | Yakov Fleytman | Enveloping speed reducer |
| CN201531561U (en) * | 2009-11-25 | 2010-07-21 | 常熟市迅达粉末冶金有限公司 | Transmission device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102871806A (en) * | 2012-10-03 | 2013-01-16 | 王秋华 | Electric walking replacing chair |
| CN108201489A (en) * | 2018-03-24 | 2018-06-26 | 苏州市职业大学（苏州开放大学） | It is a kind of can self-locking safe wheelchair |
| CN108201489B (en) * | 2018-03-24 | 2024-02-06 | 苏州市职业大学（苏州开放大学） | Self-locking safety wheelchair |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110525 |