CN203114489U - Bulldozer starting safety protection device - Google Patents
Bulldozer starting safety protection device Download PDFInfo
- Publication number
- CN203114489U CN203114489U CN 201320028503 CN201320028503U CN203114489U CN 203114489 U CN203114489 U CN 203114489U CN 201320028503 CN201320028503 CN 201320028503 CN 201320028503 U CN201320028503 U CN 201320028503U CN 203114489 U CN203114489 U CN 203114489U
- Authority
- CN
- China
- Prior art keywords
- starting
- bulldozer
- ignition switch
- protection device
- relay
- 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
- 230000001681 protective effect Effects 0.000 claims description 24
- 230000007547 defect Effects 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
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- Operation Control Of Excavators (AREA)
Abstract
The utility model provides a bulldozer starting safety protection device which comprises a keep relay, wherein release voltage of the keep relay is 3V-5V, one end of normally-open contact of the keep relay is connected with a START end of an ignition switch, the other end of the normally-open contact of the keep relay is connected with a coil of a starting relay, one end of a coil of the keep relay is connected with an SW1 end of the ignition switch, and the other end of the coil of the keep relay is connected with a D+ end of a generator. According to the bulldozer starting safety protection device, the defects of the prior art are overcome, the phenomena that after the ignition switch is started, the ignition switch can not return because of clamping stagnation; and after a bulldozer is started, a key is not released timely, and accordingly a starting motor is damaged or tooth collision of the starting motor is caused by false starting are avoided. The bulldozer starting safety protection device is simple in structure, easy to operate, safe and reliable.
Description
Technical field
The utility model relates to a kind of bulldozer and starts safety protection device, belongs to the bulldozer technical field.
Background technique
At present, according to market behaviour in service feedback, it is higher that available engine carries the starting electrical machinery rate of fault.
Bulldozer starts circuit as shown in Figure 1, and the SW1 of ignition switch 1 end connects the D+ end of first safety fuse cutout, 2 one ends and generator 3, and the ON end of ignition switch 1 connects the coil of electromagnetic relay 5, and the START end of ignition switch 1 connects an end of starting relay 4 coils; First safety fuse cutout, 2 the other ends connect an end of 24V power supply and electromagnetic relay 5 normally opened contacts, the other end of electromagnetic relay 5 normally opened contacts connects 30 ends of starting electrical machinery 7, the B+ end of generator 3 connects second safety fuse cutout, 6 one ends, second safety fuse cutout, 6 the other ends connect an end of starting relay 4 normally opened contacts and 30 ends of starting electrical machinery 7, the other end of starting relay 4 normally opened contacts connects 50 ends of starting electrical machinery 7, and the other end of starting relay 4 coils connects the inside grounding end of starting electrical machinery 7.
Starting electrical machinery 7 rate of fault are higher; mainly be because bulldozer is parked for a long time, occurred air in the oil circuit, not smooth owing to fuel feeding when starting suddenly; cause starting electrical machinery 7 to start; the driver continuously lights a fire with key with regard to needs, and ignition switch 1 contact is because after repeatedly adhesive disconnected action, the contact sticked or clamping stagnation; after starting electrical machinery 7 startings; the contact is return normally, thereby causes ceaselessly repeated priming action of starting electrical machinery 7, causes the starting motor internal gear to damage.
The model utility content
The technical problems to be solved in the utility model provides a kind of bulldozer and starts safety protection device, with prevent bulldozer because of ignition switch start the back because of clamping stagnation can not return, start the back key and fail in time to decontrol and cause that starting electrical machinery damages or false tripping causes that starting electrical machinery beats tooth and damage.
In order to solve the problems of the technologies described above, the technical solution of the utility model provides a kind of bulldozer and starts safety protection device, it is characterized in that: comprise that release voltage is the protective relay of 3V～5V, one end of protective relay normally opened contact connects the START end of ignition switch, and the other end of protective relay normally opened contact connects the coil of starting relay; One end of protective relay coil connects the SW1 end of ignition switch, and the other end of protective relay coil connects the D+ end of generator.
It is to increase a protective relay in original trigger circuit that a kind of bulldozer that the utility model provides starts safety protection device; when ignition switch is connected SW1 end and ON end; because generator D+ terminal voltage is 0V; the ON terminal voltage is 24V; the protective relay coil is connected the normally opened contact of self, starts circuit communication.When ignition switch is connected SW1 end and START end; start starting electrical machinery; generator speed rises; the voltage of generator D+ terminal is also begun to rise by 0V; when the protective relay coil being lost keep the voltage (release voltage) of connection; protective relay disconnects the normally opened contact of former connection, starts the loop and disconnects, and at this moment starting electrical machinery starts success substantially.
A kind of bulldozer that the utility model provides starts safety protection device and has overcome the deficiencies in the prior art; can prevent bulldozer because of ignition switch start the back because of clamping stagnation can not return, start the back key and fail in time to decontrol and cause that starting electrical machinery damages or false tripping causes that starting electrical machinery beats tooth and damage; apparatus structure is simple; operation is safe and reliable easily.
Description of drawings
Fig. 1 starts conspectus for bulldozer;
Schematic representation when a kind of bulldozer startup safety protection device that Fig. 2 provides for the utility model is installed in the starting circuit;
Description of reference numerals
The 1-ignition switch; 2-first safety fuse cutout; The 3-generator; The 4-starting relay; The 5-electromagnetic relay; 6-second safety fuse cutout; The 7-starting electrical machinery; The 8-protective relay.
Embodiment
For the utility model is become apparent, now with a preferred embodiment, and conjunction with figs. is described in detail below.
Schematic representation when a kind of bulldozer startup safety protection device that Fig. 2 provides for the utility model is installed in the starting circuit, it is to increase a protective relay 8 in original trigger circuit that described a kind of bulldozer starts safety protection device, one end of protective relay 8 normally opened contacts connects the START end of ignition switch 1, and the other end of protective relay 8 normally opened contacts connects the coil of starting relay 4; One end of protective relay 8 coils connects the SW1 end of ignition switch 1, and the other end of protective relay 8 coils connects the D+ end of generator 3.
Working principle: connect SW1 end and ON end when ignition switch 1, because generator 3D+ terminal voltage is 0V, the ON terminal voltage is 24V, and protective relay 8 coils are connected the normally opened contact of self, start circuit communication.When ignition switch 1 is connected SW1 end and START end; start starting electrical machinery 7; generator 3 rotating speeds rise; the voltage of generator 3D+ terminal is also begun to rise by 0V; during to the voltage (release voltage) that protective relay 8 coils lost keep connection; protective relay 8 disconnects the normally opened contact of former connection, starts the loop and disconnects, and at this moment starting electrical machinery 7 starts successfully substantially.
Note the selection of protective relay 8; the release voltage of protective relay should be controlled within 3V～5V; if too high may the causing of release voltage also do not start the fault (showing twice impacting start that starting electrical machinery is of short duration) that successfully just disconnects the startup loop; rule of thumb the release voltage about 5V generally can both normally start, and 3V is better than 5V.
A kind of bulldozer that the utility model provides start safety protection device can prevent bulldozer because of ignition switch start the back because of clamping stagnation can not return, start the back key and fail in time to decontrol and cause that starting electrical machinery damages or false tripping causes that starting electrical machinery beats tooth and damage.Apparatus structure is simple, and operation is safe and reliable easily.
Claims (1)
1. a bulldozer starts safety protection device, it is characterized in that: comprise that release voltage is the protective relay (8) of 3V～5V, one end of protective relay (8) normally opened contact connects the START end of ignition switch (1), and the other end of protective relay (8) normally opened contact connects the coil of starting relay (4); One end of protective relay (8) coil connects the SW1 end of ignition switch (1), and the other end of protective relay (8) coil connects the D+ end of generator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028503 CN203114489U (en) | 2013-01-18 | 2013-01-18 | Bulldozer starting safety protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028503 CN203114489U (en) | 2013-01-18 | 2013-01-18 | Bulldozer starting safety protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114489U true CN203114489U (en) | 2013-08-07 |
Family
ID=48894843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320028503 Expired - Fee Related CN203114489U (en) | 2013-01-18 | 2013-01-18 | Bulldozer starting safety protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114489U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150822A (en) * | 2015-04-14 | 2016-11-23 | 新疆科立机械设备有限公司 | A kind of starter duplicate protection control system |
| CN108563147A (en) * | 2018-02-12 | 2018-09-21 | 江苏柳工机械有限公司 | The start stop system of engineering machinery |
-
2013
- 2013-01-18 CN CN 201320028503 patent/CN203114489U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150822A (en) * | 2015-04-14 | 2016-11-23 | 新疆科立机械设备有限公司 | A kind of starter duplicate protection control system |
| CN108563147A (en) * | 2018-02-12 | 2018-09-21 | 江苏柳工机械有限公司 | The start stop system of engineering machinery |
| CN108563147B (en) * | 2018-02-12 | 2023-09-22 | 柳工常州机械有限公司 | Start-stop system of engineering machinery |
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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: 20130807 Termination date: 20150118 |
|
| EXPY | Termination of patent right or utility model |