CN202193554U - Luffing speed control system for grab bucket of gantry crane - Google Patents
Luffing speed control system for grab bucket of gantry crane Download PDFInfo
- Publication number
- CN202193554U CN202193554U CN201120236135XU CN201120236135U CN202193554U CN 202193554 U CN202193554 U CN 202193554U CN 201120236135X U CN201120236135X U CN 201120236135XU CN 201120236135 U CN201120236135 U CN 201120236135U CN 202193554 U CN202193554 U CN 202193554U
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- China
- Prior art keywords
- frequency converter
- grab bucket
- speed
- luffing
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- 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
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- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model relates to an luffing speed control system for a grab bucket of a gantry crane, and is characterized in that the luffing speed control system comprises a main controller, a frequency converter, a motor, a screw, a rotary encoder and an absolute value encoder, wherein the main controller is connected with the frequency converter; the frequency converter is connected with the motor; the rotary encoder is mounted on the motor; the screw is connected with the rotary encoder and the absolute value encoder; the absolute value encoder is connected with the main controller; and the rotary encoder is connected with the frequency converter. The utility model has the advantages that speed ratio of the luffing mechanism speed of each area of a luffing mechanism to the translation speed of the grab bucket is calculated to keep the translation speed of the grab bucket constant; and the speed of the luffing mechanism is changed in such a manner the output frequency of the frequency converter is controlled by the main controller according to the position of the luffing screw, so that the translation speed of the grab bucket is kept constant, which facilitates quick unloading.
Description
Technical field
The utility model relates to a kind of machine grab bucket luffing speed control system.
Background technology
Because the luffing rapid speed of this TV station door machine, just the stability to this machine grab bucket operation proposes higher requirement.In the former design; The speed that generally is luffing mechanism is constant; Through four-bar linkage, being reflected on the speed of horizontal translation of grab bucket is exactly variable-speed operation, in the design of door machine, grab bucket speed generally is controlled at maximum speed and is not higher than 2.5 times of average velociity; And velocity variations is bigger under the situation of little luffing; Under the situation of the fast speed that changes, grab bucket just moving horizontally and swinging superimposed must the moving of operation, has very big influence to the stability of operation and the discharging of grab bucket like this.
The utility model content
The purpose of the utility model provides a kind of machine grab bucket luffing speed control system.
The technical scheme that the utility model adopts is:
Door machine grab bucket luffing speed control system; Comprise master controller, frequency converter, electrical motor, screw rod, rotary encoder and absolute value encoder, said master controller links to each other with frequency converter, and said frequency converter links to each other with electrical motor; Said motor mounting has rotary encoder and links to each other with screw rod; Said screw rod links to each other with absolute value encoder, and said absolute value encoder links to each other with master controller, and said rotary encoder links to each other with frequency converter.
The utility model has the advantages that: for the running velocity that guarantees the grab bucket horizontal translation constant; Calculate the speed ratio relation of translatory velocity of each interval luffing mechanism speed and the grab bucket of luffing mechanism; Change the speed of luffing mechanism according to the output frequency of the position control frequency converter of luffing screw rod through master controller; Make the horizontal velocity of grab bucket keep constant, help the fast speed discharging.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail.
Fig. 1 is the structural representation of the utility model.
Wherein: 1, master controller, 2, frequency converter, 3, electrical motor, 4, screw rod, 5, rotary encoder, 6, absolute value encoder.
The specific embodiment
As shown in Figure 1, the door machine grab bucket luffing speed control system of the utility model comprises master controller 1, frequency converter 2, electrical motor 3, screw rod 4, rotary encoder 5 and absolute value encoder 6; Master controller 1 links to each other with frequency converter 2; Frequency converter 2 links to each other with electrical motor 3, and electrical motor 3 is equipped with rotary encoder 5 and links to each other with screw rod 4, and screw rod 4 links to each other with absolute value encoder 6; Absolute value encoder 6 links to each other with master controller 1, and rotary encoder 5 links to each other with frequency converter 2.For the running velocity that guarantees the grab bucket horizontal translation constant; Calculate the speed ratio relation of translatory velocity of each interval luffing mechanism speed and the grab bucket of luffing mechanism; Change the speed of luffing mechanism according to the output frequency of the position control frequency converter of luffing screw rod through master controller 1; Make the horizontal velocity of grab bucket keep constant, help the fast speed discharging.
The operation of the utility model: frequency converter 2 control motors 3 move around screw rod 4; The position signal that screw rod 4 moves around sends master controller 1 to through absolute value encoder 6; And the velocity of rotation of electrical motor 3 sends rotary encoder 5 to; Rotary encoder 5 is given frequency converter 2 with velocity feedback, and master controller 1 changes the speed of luffing mechanism according to the output frequency of the position control frequency converter of luffing screw rod.
Claims (1)
1. door machine grab bucket luffing speed control system; It is characterized in that: comprise master controller, frequency converter, electrical motor, screw rod, rotary encoder and absolute value encoder, said master controller links to each other with frequency converter, and said frequency converter links to each other with electrical motor; Said motor mounting has rotary encoder and links to each other with screw rod; Said screw rod links to each other with absolute value encoder, and said absolute value encoder links to each other with master controller, and said rotary encoder links to each other with frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120236135XU CN202193554U (en) | 2011-07-06 | 2011-07-06 | Luffing speed control system for grab bucket of gantry crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120236135XU CN202193554U (en) | 2011-07-06 | 2011-07-06 | Luffing speed control system for grab bucket of gantry crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202193554U true CN202193554U (en) | 2012-04-18 |
Family
ID=45948475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120236135XU Expired - Fee Related CN202193554U (en) | 2011-07-06 | 2011-07-06 | Luffing speed control system for grab bucket of gantry crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202193554U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105253776A (en) * | 2015-11-25 | 2016-01-20 | 北京金自天正智能控制股份有限公司 | Semi-automatic control method of gantry crane |
-
2011
- 2011-07-06 CN CN201120236135XU patent/CN202193554U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105253776A (en) * | 2015-11-25 | 2016-01-20 | 北京金自天正智能控制股份有限公司 | Semi-automatic control method of gantry crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20160817 Granted publication date: 20120418 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170217 Granted publication date: 20120418 |
|
| PP01 | Preservation of patent right |
Effective date of registration: 20170308 Granted publication date: 20120418 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170908 Granted publication date: 20120418 |
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| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180507 Granted publication date: 20120418 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20210507 Granted publication date: 20120418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20190706 |