CN211871237U - Variable-frequency electric crane - Google Patents
Variable-frequency electric crane Download PDFInfo
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- CN211871237U CN211871237U CN201922468770.XU CN201922468770U CN211871237U CN 211871237 U CN211871237 U CN 211871237U CN 201922468770 U CN201922468770 U CN 201922468770U CN 211871237 U CN211871237 U CN 211871237U
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- cross beam
- frequency motor
- rotary encoder
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Abstract
The utility model discloses a variable-frequency electric crane, which comprises a frame, a crane boom, a hoisting mechanism and a hoisting variable-frequency motor, wherein the frame comprises a cross beam, a base and a pair of stand columns, the bottom ends of the stand columns are respectively fixed on the base through shafts, the cross beam is horizontally erected at the top of the stand columns through shaft sleeves at two ends, the bottom end of the crane boom is fixed on the base through the shafts, the top of the crane boom passes through a through hole in the middle of the cross beam, the cross beam is sleeved with a fixed pulley, one end of the base is provided with an electric capstan, and the electric capstan winds up; a hanging hook is fixed at the bottom of the fixed pulley; the electric capstan is driven by a lifting variable frequency motor and comprises a variable frequency motor and a rotary encoder, wherein the rotary encoder is coaxially arranged with a rotating shaft of the variable frequency motor. The utility model discloses convenient and practical plays to rise the motor through converter vector control for permanent torque also can be guaranteed to the motor even in the time of low frequency, and inertia is little, and high frequency overload capacity is strong, and the jack-up speed governing is steady, safe and reliable.
Description
Technical Field
The utility model relates to a hoisting equipment technical field specifically is a variable frequency electric crane.
Background
In the fields of industrial production processing, building construction and the like, a crane is an extremely important tool. The crane is usually a mechanical, hydraulic or electric crane, and has large vibration and unstable start during operation, which causes unsafe factors to production; the influence on the brake and the mechanism of the crane is large, and the service life of the crane is reduced; the starting current is high, the operation is frequent, and the electric energy is wasted; the low gear is not enough, the high gear is fast, and the hidden danger of safety accidents is easily caused. There is a need to develop an electric crane that can operate smoothly with a higher safety factor.
Disclosure of Invention
The utility model aims at providing an electric crane convenient to stable speed governing to overcome not enough among the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a frequency conversion type electric crane comprises a frame, a crane boom, a lifting mechanism and a lifting frequency conversion motor;
the machine frame comprises a cross beam, a base and a pair of stand columns, the bottom ends of the stand columns are respectively fixed on the base through shafts, and the cross beam is horizontally erected at the tops of the stand columns through shaft sleeves at two ends;
the bottom end of the cargo boom is fixed on the base through a shaft, and the top of the cargo boom penetrates through a through hole in the middle of the cross beam;
the fixed pulley is sleeved on the cross beam,
an electric capstan is arranged at one end of the base, and a steel wire rope surrounding the fixed pulley is wound and unwound by the electric capstan; a hanging hook is fixedly hung at the bottom of the fixed pulley;
the electric winch is driven by a lifting variable frequency motor and comprises a variable frequency motor and a rotary encoder, wherein the rotary encoder is coaxially arranged with a rotating shaft of the variable frequency motor, and the variable frequency motor controls the rotating shaft according to a vector fed back by the rotary encoder.
The rotary encoder is coaxially connected with the rotating shaft through a flexible connector.
The variable frequency motor is also provided with a monitoring screen.
The rotary encoder is of the type OMRON E6B 2-CWZIX.
The bottom of the crossbeam is provided with a hydraulic support rod which is arranged obliquely, and the bottom of the hydraulic support rod is connected with the base through a shaft.
Furthermore, the monitoring screen controls the communication of the variable frequency motor through a wireless signal transmitter.
The beneficial effects of the utility model reside in that: the crane has the advantages that the crane is stable in starting, the acceleration time and the deceleration time can be freely set as required, the crane runs stably, the influence on a brake, a steel wire rope and a beam of the crane is greatly reduced, the service life of the crane is prolonged, and the safety factor of the crane is improved.
Drawings
Fig. 1 is a side view of the structure diagram of the present invention.
Fig. 2 is a schematic structural view of the motor.
The lifting device comprises a base 1, a base 2, a stand column 3, a cross beam 4, a lifting arm 5, a through hole 6, a lifting hook 7, a hydraulic supporting rod 8, a steel wire rope 9, an electric winch 10, a lifting variable frequency motor 11, a variable frequency motor 12, a rotating shaft 13 and a rotary encoder.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The variable-frequency electric crane shown in the attached figure 1 comprises a frame, a crane boom, a hoisting mechanism and a hoisting variable-frequency motor; the frame comprises a cross beam, a base and a pair of stand columns, the bottom ends of the stand columns are respectively fixed on the base through shafts, and the cross beam is horizontally erected at the tops of the stand columns through shaft sleeves at two ends;
the bottom end of the cargo boom is fixed on the base through a shaft, and the top of the cargo boom penetrates through a through hole in the middle of the cross beam;
the beam is sleeved with the fixed pulley, one end of the base is provided with an electric winch, and the electric winch winds and unwinds a steel wire rope surrounding the fixed pulley; a hanging hook is fixedly hung at the bottom of the fixed pulley;
the electric capstan is driven by a lifting variable frequency motor and comprises a variable frequency motor and a rotary encoder, wherein the rotary encoder is coaxially arranged with a rotating shaft of the variable frequency motor, and the variable frequency motor controls the rotating shaft according to a vector fed back by the rotary encoder.
The rotary encoder is coaxially connected with the rotating shaft through a flexible connector.
And a monitoring screen is also arranged on the variable frequency motor.
The rotary encoder is of the type OMRON E6B 2-CWZIX.
The bottom of the cross beam is provided with a hydraulic support rod which is arranged obliquely, and the bottom of the hydraulic support rod is connected with the base through a shaft.
The monitoring screen carries out communication control on the variable frequency motor through the wireless signal transmitter.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (6)
1. A variable frequency electric crane is characterized by comprising a frame, a crane boom, a hoisting mechanism and a hoisting variable frequency motor;
the machine frame comprises a cross beam, a base and a pair of stand columns, the bottom ends of the stand columns are respectively fixed on the base through shafts, and the cross beam is horizontally erected at the tops of the stand columns through shaft sleeves at two ends;
the bottom end of the cargo boom is fixed on the base through a shaft, and the top of the cargo boom penetrates through a through hole in the middle of the cross beam;
the fixed pulley is sleeved on the cross beam,
an electric capstan is arranged at one end of the base, and a steel wire rope surrounding the fixed pulley is wound and unwound by the electric capstan; a hanging hook is fixedly hung at the bottom of the fixed pulley;
the electric winch is driven by a lifting variable frequency motor and comprises a variable frequency motor and a rotary encoder, wherein the rotary encoder is coaxially arranged with a rotating shaft of the variable frequency motor, and the variable frequency motor controls the rotating shaft according to a vector fed back by the rotary encoder.
2. The variable frequency electric crane according to claim 1, wherein the rotary encoder is coaxially connected to the shaft by a flexible connector.
3. The variable-frequency electric crane according to claim 1, wherein a monitor screen is further provided on the variable-frequency motor.
4. The variable-frequency electric crane according to claim 1, wherein the rotary encoder is of the type OMRON E6B 2-CWZIX.
5. The variable-frequency electric crane according to claim 1, wherein the bottom of the cross beam is provided with a hydraulic support rod which is arranged obliquely, and the bottom of the hydraulic support rod is connected with the base through a shaft.
6. The variable-frequency electric crane according to claim 3, wherein the monitoring screen controls the variable-frequency motor through wireless signal transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922468770.XU CN211871237U (en) | 2019-12-31 | 2019-12-31 | Variable-frequency electric crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922468770.XU CN211871237U (en) | 2019-12-31 | 2019-12-31 | Variable-frequency electric crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211871237U true CN211871237U (en) | 2020-11-06 |
Family
ID=73259858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922468770.XU Active CN211871237U (en) | 2019-12-31 | 2019-12-31 | Variable-frequency electric crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211871237U (en) |
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2019
- 2019-12-31 CN CN201922468770.XU patent/CN211871237U/en active Active
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