CN105375679A - Motor speed limit protective device - Google Patents
Motor speed limit protective device Download PDFInfo
- Publication number
- CN105375679A CN105375679A CN201510841578.4A CN201510841578A CN105375679A CN 105375679 A CN105375679 A CN 105375679A CN 201510841578 A CN201510841578 A CN 201510841578A CN 105375679 A CN105375679 A CN 105375679A
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- China
- Prior art keywords
- groove
- hole
- rotating shaft
- centrifugal
- protective device
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a motor speed limit protective device comprising a rotating shaft, and an end cap and bolts. The end cap is fixedly connected with an external rack. At least two grooves are uniformly distributed on the circumferential direction of the rotating shaft. The grooves are internally provided with centrifugal blocks which can move along the radial direction of the grooves. Each centrifugal block is provided with a first groove and a first through hole. The first groove is communicated with the first through hole. The position, which is corresponding to the first through hole, of the rotating shaft is provided with a threaded hole. The bolts pass through the first grooves, the first through holes and the threaded holes in turn. Compression springs are arranged between the bolts and the first grooves. One end of the compression springs is abutted against the first grooves, and the other end of the compression springs is abutted against the bolts. The beneficial effects of the motor speed limit protective device are that the centrifugal blocks and the compression springs are arranged between the rotating shaft and the end cap so that automatic limiting of the maximum rotating speed of the motor can be realized, the motor is enabled to constantly work under the maximum rotating speed, and driving safety of the motor body and a vehicle can be guaranteed.
Description
Technical field
The present invention relates to electric motor protective device, be specially a kind of motor speed limit protective device.
Background technology
It is power that electric automobile (BEV) refers to vehicle power, drives wheels travel with motor, meets the vehicle of road traffic, safety regulations requirements.Due to less relative to orthodox car to environmental impact, its prospect is extensively had an optimistic view of.
Electric automobile, using electric energy as power, by motor direct-drive running car, has the advantage that speed-raising is fast, stable.In the actual driving environment of electric automobile, for the consideration to driver and vehicle safety, to limit electric automobile maximum speed, prevent overspeed of vehicle driving on the one hand, cause the security loss of the person and property, on the other hand, the bearing of general Motor for Electric Automobile has speed to limit, once hypervelocity may aggravate to damage, reduce the useful life of motor.On now general electric automobile, the restriction of motor maximum speed is all adopt the method for vector control, but the circuit structure of the method is complicated and control method is still immature.
Summary of the invention
The invention is intended to provide a kind of energy volitional check motor maximum speed and the simple motor speed limit protective device of structure.
Motor speed limit protective device in this programme; comprise rotating shaft, end cap and bolt; end cap is fixedly connected with external rack; in rotating shaft, circumference is evenly equipped with at least two grooves; be provided with in groove and can move radially centrifugal-block along groove; centrifugal-block offers the first groove and the first through hole; first groove and the first through hole communicate; rotating shaft offers screwed hole with the first through hole relative position; bolt is successively by the first groove, the first through hole and screwed hole; be provided with stage clip between bolt and the first groove, stage clip one end and the first groove offset, and the stage clip other end and bolt offset.
The operation principle of this programme is: when motor normally works, stage clip props up the first groove, centrifugal-block is separated with end cap inner circle, centrifugal-block bolt under the effect of spring with rotating shaft campaign, when the rotating speed of rotating shaft reaches limits value, now the centrifugal force of centrifugal-block will overcome the active force of stage clip, under the influence of centrifugal force, centrifugal-block outwards moves along groove footpath until centrifugal-block cylindrical and end cap inner circle are fitted, because end cap is fixedly connected with external rack, therefore the frictional force between end cap and centrifugal-block makes the rotating speed of rotating shaft decline, until rotating shaft rotating speed drops to below limits value, now centrifugal-block separates with end cap inwall under the active force of stage clip, rotating shaft runs well.
The beneficial effect of this programme is: by the centrifugal-block that arranges between rotating shaft and end cap and stage clip, when motor speed exceedes limits value, centrifugal-block and end cap are automatically combined and motor speed are declined, when motor speed drops to below limits value, centrifugal-block is separated voluntarily with end cap, thus achieve the volitional check of motor maximum speed, make motor always work in below maximum speed, ensure the driving safety of motor body and vehicle.
Further, in order to make the uniform force of whole protective device, groove is circumferential uniform four.
Further, in order to increase the frictional force between centrifugal-block and end cap, centrifugal-block cylindrical is provided with friction plate.
Further, in order to make the contact area of friction plate and end cap inwall maximum, frictional force is maximum, and friction plate cylindrical circular arc radius of curvature equals end cap inner circle circular arc radius of curvature.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference numeral in Figure of description comprises: rotating shaft 1, centrifugal-block 2, friction plate 3, stage clip 4, bolt 5, end cap 6.
Embodiment is substantially as shown in Figure 1: motor speed limit protective device, comprises machine shaft 1, and rotating shaft 1 circumference is evenly equipped with four grooves, and the rotating shaft 1 of the center of four grooves offers screwed hole,
Centrifugal-block 2 is respectively equipped with in four grooves, centrifugal-block 2 overall dimension just to be put in groove with centrifugal-block 2 and can be moved radially and is as the criterion, the first groove and the first through hole is offered in the position that the middle part of centrifugal-block 2 is corresponding with rotating shaft 1 upper screwed hole, first groove is positioned at the first through hole top and the first groove and the first through hole communicate, bolt 5 is successively through the first groove, first through hole and screwed hole, the downside thread segment of bolt 5 is arranged in the screwed hole of rotating shaft 1, the smooth section of bolt 5 is positioned at the first groove, stage clip 4 is provided with outside the smooth section of bolt 5, the lower end of stage clip 4 props up the first bottom portion of groove, stage clip 4 upper end props up bolt 5 head, the pretightning force of the adjustable stage clip 4 of degree of tightening of adjusting bolt 5, and then the limits value of rotating shaft 1 rotating speed can be regulated.
At the outer friction plate 3 be also provided with for increasing friction force of centrifugal-block 2, the inner circle circular arc radius of curvature of friction plate 3 equals centrifugal-block 2 cylindrical circular arc radius of curvature, centrifugal-block 2 cylindrical circular arc radius of curvature equals end cap 6 inner circle circular arc radius of curvature, in the middle part of friction plate 3, have the through hole of dodging bolt 5 head with bolt 5 correspondence position.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from structure of the present invention, some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.The protection range that this application claims should be as the criterion with the content of its claim, and the embodiment in specification etc. record the content that may be used for explaining claim.
Claims (4)
1. a motor speed limit protective device, it is characterized in that, comprise rotating shaft, end cap and bolt, described end cap is fixedly connected with external rack, in described rotating shaft, circumference is evenly equipped with at least two grooves, the centrifugal-block that can move radially along described groove is provided with in described groove, described centrifugal-block offers the first groove and the first through hole, described first groove and described first through hole communicate, described rotating shaft offers screwed hole with described first through hole relative position, described bolt is successively by described first groove, described first through hole and described screwed hole, stage clip is provided with between described bolt and described first groove, described stage clip one end and described first groove offset, the described stage clip other end and described bolt offset.
2. motor speed limit protective device according to claim 1, is characterized in that: described groove is circumferential uniform four.
3. motor speed limit protective device according to claim 2, is characterized in that: described centrifugal-block cylindrical is provided with friction plate.
4. motor speed limit protective device according to claim 3, is characterized in that: described friction plate cylindrical circular arc radius of curvature equals described end cap inner circle circular arc radius of curvature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510841578.4A CN105375679A (en) | 2015-11-28 | 2015-11-28 | Motor speed limit protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510841578.4A CN105375679A (en) | 2015-11-28 | 2015-11-28 | Motor speed limit protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105375679A true CN105375679A (en) | 2016-03-02 |
Family
ID=55377582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510841578.4A Pending CN105375679A (en) | 2015-11-28 | 2015-11-28 | Motor speed limit protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105375679A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111195399A (en) * | 2018-11-19 | 2020-05-26 | 金梦雅 | Hotel faces empty guardrail |
| CN111776906A (en) * | 2020-06-11 | 2020-10-16 | 上海市建筑科学研究院科技发展有限公司 | Method and device for adjusting action speed of self-resetting progressive overspeed protector |
-
2015
- 2015-11-28 CN CN201510841578.4A patent/CN105375679A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111195399A (en) * | 2018-11-19 | 2020-05-26 | 金梦雅 | Hotel faces empty guardrail |
| CN111776906A (en) * | 2020-06-11 | 2020-10-16 | 上海市建筑科学研究院科技发展有限公司 | Method and device for adjusting action speed of self-resetting progressive overspeed protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160302 |
|
| WD01 | Invention patent application deemed withdrawn after publication |