CN203454943U - Rack-and-pinion type shifter - Google Patents
Rack-and-pinion type shifter Download PDFInfo
- Publication number
- CN203454943U CN203454943U CN201320404929.1U CN201320404929U CN203454943U CN 203454943 U CN203454943 U CN 203454943U CN 201320404929 U CN201320404929 U CN 201320404929U CN 203454943 U CN203454943 U CN 203454943U
- Authority
- CN
- China
- Prior art keywords
- rack
- dial plate
- fixed
- bus
- shifter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 13
- 239000010931 gold Substances 0.000 description 13
- 229910052737 gold Inorganic materials 0.000 description 13
- 239000012212 insulator Substances 0.000 description 5
- 229910052573 porcelain Inorganic materials 0.000 description 5
- 230000010339 dilation Effects 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Transmission Devices (AREA)
Abstract
The utility model provides a rack-and-pinion type shifter belonging to the technical field of power tube buses, which comprises a rack, a gear shaft meshed with the rack, and a dial with scales. One end of the gear shaft penetrates the dial and is fixedly provided with a pointer. According to the technical scheme of the utility model, the linear displacement of a power tube bus is amplified and converted into the angular displacement of the gear shaft. Meanwhile, the angular displacement of the gear shaft is displayed on the dial by means of the pointer. Therefore, the management personnel can conveniently, visually and accurately observe the displacement.
Description
Technical field
The utility model belongs to power pipe bus technical field, relates in particular to a kind of pinion and-rack shifter.
Background technology
Transformer station's high voltage (220kV, 110kV) grade electrical equipment, all connects by tubulose aluminium wire, and these wires are referred to as bus.The effect of bus is collect, distribute and transmit electric energy.Bus is divided into hard bus and soft bus by structure, and hard bus is divided into again brace type bus and suspension type bus.Brace type bus, because of advantages such as its floor area are little, simple in structure, through-current capacity is large, is widely used in 220kV transformer station.
Brace type tubulose bus is comprised of bus structure, porcelain insulator, bus bar cupport, bus bar fixing hardware and power pipe bus conventionally.Described bus structure is general apart from ground 3.5-4 rice, 1.2 meters of described porcelain insulator height, be fixed on bus structure, two joint porcelain insulators for 220kV bus, described bus bar cupport is fixed on porcelain insulator top, power pipe bus two ends are supported by described bus bar fixing hardware, described bus bar fixing hardware comprises movable gold utensil and fixed gold utensil, a fixed gold utensil is installed in power pipe bus one end, the other end is installed movable gold utensil, when variation of ambient temperature causes power pipe bus to expand with heat and contract with cold, fixed gold utensil has limited the breathing direction of power pipe bus, movable gold utensil can allow the free to contract and expand of power pipe bus.If movable gold utensil occurs bite fault and cannot make power pipe bus free-extension, there is like this serious accidents such as porcelain insulator ruptures, bus collapses.Therefore must often monitor the breathing situation of power bus-bar, if note abnormalities, take measures in time to fix a breakdown, guarantee power plant safety reliability service.
The method of observation power pipe bus dilation situation is standardized the markings of power pipe bus in movable gold utensil one side at present, fixes a graduated scale and extend to below the markings of tubulose bus on the bracket of movable gold utensil.During power pipe bus dilation, the scale label of the markings of pipe bus relative to its below produces and moves.If environment temperature changes, and pipe bus markings without mobile phenomenon, explanation activity gold utensil has bite fault, eliminating must take immediate steps.But under actual conditions, due to the limited length (general 10 meters of left and right) of the power pipe bus of each unit, its amplitude with variation of ambient temperature is very little, generally, 1 ℃ of variation of ambient temperature, its length variations is less than 0.5mm, and therefore directly observation and comparison is difficult.
Utility model content
In view of the above problems, the utility model provides a kind of pinion and-rack shifter, is intended to solve because power pipe bus dilation amount is conventionally less, directly the more difficult technical matters of sighting tube bus linear displacement.
The utility model is achieved in that a kind of pinion and-rack shifter, the graduated dial plate of tooth axle, tool that comprise tooth bar, is meshed with described tooth bar, and one end of described tooth axle is through described dial plate and be fixed with pointer.
Further, the described dial plate back side is also fixed with the holder for fixed displacement device.
Further, the described dial plate back side is also fixed with rotary shaft rack, and described tooth axle one end is through described dial plate, and the other end is through described rotary shaft rack.
Further, described rotary shaft rack and tooth shaft connection place, and described dial plate and tooth shaft connection place are equipped with bearing.
Further, the described dial plate back side is also fixed with protection back cover.
Further, described pointer is fixed clampingly on described tooth axle by nut.
Further, top, the described dial plate back side is also fixed with ceiling.
The beneficial effects of the utility model are: during use, the tooth axle of shifter is fixed on the movable gold utensil of power pipe bus, when power pipe bus expands or shrinks, drive described tooth bar to move, described in described rack-driving, tooth axle is crossed certain angle, pointer turns over certain angle in company with described tooth axle on dial plate, the utility model amplifies the linear displacement of power pipe bus the angle displacement that converts tooth axle to, and described angle displacement indicates on dial plate by pointer, facilitate like this managerial personnel's accurately observation directly perceived.
Accompanying drawing explanation
Fig. 1 is the side sectional view of the pinion and-rack shifter that provides of the utility model embodiment;
Fig. 2 is the front elevation of the pinion and-rack shifter that provides of the utility model embodiment;
Fig. 3 is bowing to cut-open view of the pinion and-rack shifter that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
For technical scheme described in the utility model is described, below by specific embodiment, describe.
Fig. 1-Fig. 3 is respectively side sectional view, the front elevation of the pinion and-rack shifter that provides of the utility model embodiment and bows to cut-open view, only shows for convenience of explanation the part relevant to the utility model embodiment.
The pinion and-rack shifter that the present embodiment provides comprises tooth bar 11, the graduated dial plate 2 of the tooth axle 12, the tool that are meshed with described tooth bar, one end of described tooth axle 12 is through described dial plate and be fixed with pointer 3, when promoting described tooth bar 11 displacement, described pointer 3 rotates together with described tooth axle 12.Preferably, the described dial plate back side is also fixed with the holder 4 for fixed displacement device.Described pointer 3 is fixed clampingly on described tooth axle 12 by nut.
When concrete use, by described holder 4, shifter is being fixed on the bus structure of power pipe bus, and tooth bar 11 is fixed on the movable gold utensil of power pipe bus, preferably, as a kind of mounting means, described holder 4 is fixed on a pedestal web joint 7, described pedestal web joint 7 is fixedly connected with bus structure, described tooth bar 11 two ends are fixed on a plate 8, and described web joint 8 is provided with socket, and described socket is connected with the movable gold utensil on power pipe bus.
After power pipe bus expands with heat and contract with cold, its movable end produces linear displacement, by described web joint 8, drives described tooth bar 11 to move, and tooth axle 12 and pointer 3 rotate described in described tooth bar 11 transmissions, and pointer can clearly indicate in the angle turning on dial plate.Generally, because the element length of pipe bus can not be oversize, such as the aluminium alloy matter pipe bus of long 10 meters, when T=10 ℃ of variation of ambient temperature Δ, its breathing amount
the thermal linear expansion coefficient of aluminium-alloy pipe bus
so Δ L=23.91 * 10
-6* 10
4(mm) * 10 ℃=2.391mm, so little displacement is difficult to observe on the high pylon in 10 meters of left and right.Suppose that tooth axle 12 diameters are d, the diameter of dial plate 2 is D, the linear breathing amount enlargement factor K=D/d of the power pipe bus of the utility model embodiment, if d=5mm, D=400mm, known K=80.Therefore pointer is actual linear displacement at the indicated scale variable quantity of dial plate 80 times, even if power pipe bus length subtle change also can indicate clearly on dial plate, facilitates managerial personnel's accurately observation directly perceived.
Be further used as a kind of preferred implementation, the described dial plate back side is also fixed with rotary shaft rack 13, described tooth axle 12 one end are through described dial plate 2, the other end is through described rotary shaft rack 13, described rotary shaft rack 13 and tooth axle 12 junctions, and described dial plate 2 is equipped with bearing 14 with tooth axle 12 junctions, by described bearing 14, described tooth axle 12 can flexible rotating.Further, described dial plate 2 back sides are also fixed with protection back cover 5, and described protection back cover 5 covers described rotary shaft rack 13, and back cover 5 both-side openings are exposed tooth bar two ends, and have the sufficiently long length that moves freely.
Further, as a kind of preferred implementation, described dial plate 2 tops, the back side are also fixed with ceiling 6, further protect shifter not to be damaged.
To sum up, the shifter that the present embodiment provides is a kind of pinion and-rack shifter, the linear displacement of power pipe bus can be amplified to the angle displacement that converts tooth axle to, and indicate on dial plate, pointer rotates highly sensitive, even if variation of ambient temperature is less, the dilation amount of power pipe bus also can be known exactly and show, and is convenient to managerial personnel's observation.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a pinion and-rack shifter, it is characterized in that, tooth axle (12), the graduated dial plate of tool (2) that described shifter comprises tooth bar (11), is meshed with described tooth bar, one end of described tooth axle (12) is through described dial plate and be fixed with pointer (3).
2. pinion and-rack shifter as claimed in claim 1, is characterized in that, the described dial plate back side is also fixed with the holder (4) for fixed displacement device.
3. pinion and-rack shifter as claimed in claim 2, is characterized in that, the described dial plate back side is also fixed with rotary shaft rack (13), and described tooth axle (12) one end is through described dial plate (2), and the other end is through described rotary shaft rack (13).
4. pinion and-rack shifter as claimed in claim 3, is characterized in that, described rotary shaft rack (13) and tooth axle (12) junction, and described dial plate (2) is equipped with bearing (14) with tooth axle (12) junction.
5. pinion and-rack shifter as claimed in claim 4, is characterized in that, described dial plate (2) back side is also fixed with protection back cover (5).
6. pinion and-rack shifter as claimed in claim 5, is characterized in that, described pointer (3) is fixed clampingly on described tooth axle (12) by nut.
7. pinion and-rack shifter as claimed in claim 6, is characterized in that, described dial plate (2) top, the back side is also fixed with ceiling (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320404929.1U CN203454943U (en) | 2013-07-09 | 2013-07-09 | Rack-and-pinion type shifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320404929.1U CN203454943U (en) | 2013-07-09 | 2013-07-09 | Rack-and-pinion type shifter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203454943U true CN203454943U (en) | 2014-02-26 |
Family
ID=50134810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320404929.1U Expired - Fee Related CN203454943U (en) | 2013-07-09 | 2013-07-09 | Rack-and-pinion type shifter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203454943U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320034A (en) * | 2019-08-09 | 2019-10-11 | 东北大学秦皇岛分校 | A kind of linear bearing linearity measurer based on corner variation |
-
2013
- 2013-07-09 CN CN201320404929.1U patent/CN203454943U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320034A (en) * | 2019-08-09 | 2019-10-11 | 东北大学秦皇岛分校 | A kind of linear bearing linearity measurer based on corner variation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140226 Termination date: 20200709 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |