CN201901557U

CN201901557U - Electric capstan

Info

Publication number: CN201901557U
Application number: CN2010206778894U
Authority: CN
Inventors: 郑鸣奎
Original assignee: Ningbo Chima Winch Co Ltd
Current assignee: Ningbo Chima Winch Co Ltd
Priority date: 2010-12-13
Filing date: 2010-12-13
Publication date: 2011-07-20
Anticipated expiration: 2020-12-13

Abstract

The utility model discloses an electric capstan with a simple structure and good braking stability. The electric capstan comprises a motor, a speed reducer and a hoisting drum, wherein the speed reducer comprises a first worm, a first worm gear, a second worm which is coaxial with the first worm gear, and an output shaft provided with a second worm gear; the first worm is engaged with the first worm gear, and the second worm is engaged with the second worm gear; an output end of the motor is connected with an input end of the worm, and an output end of the output shaft is connected with an input end of the hoisting drum; and the lead angle of the first worm is less than the equivalent friction angle between gear teeth when the first worm is engaged with the first worm gear, or the lead angle of the second worm is less than the equivalent friction angle between gear teeth when the second worm is engaged with the second worm gear.

Description

Electric capstan

Technical field

The utility model relates to the capstan winch technical field, specifically is a kind of electric capstan.

Background technology

Electric capstan is mainly used in cross country car, agricultural vehicle, yacht and other special vehicles, is the self-protection and the draw gear of vehicle, boats and ships etc.In the needs towage, rescue and comprise that electric capstan played very big effect when situation such as was saved oneself in the field.Present electric capstan generally comprises motor, drive link, winding drum, speed reduction gearing and brake gear, structure is comparatively complicated, and after using longer a period of time, the stability of brake gear is variation gradually, accident potential is bigger, and described brake gear is used to pin winding drum, stops winding drum to rotate, thereby be user-friendly for associative operation, must guarantee user's safety simultaneously.

The utility model content

The technical problems to be solved in the utility model is, a kind of electric capstan of simple in structure, brake good stability is provided.

The technical solution of the utility model is, the utility model electric capstan, it comprises motor, speed reduction gearing and winding drum, described speed reduction gearing comprises first worm screw, first worm gear, with coaxial second worm screw of first worm gear, be provided with the output shaft of second worm gear, first worm screw and the engagement of first worm gear, second worm screw and the engagement of second worm gear; The mouth of described motor is connected with the input end of first worm screw, and the mouth of described output shaft is connected with the input end of winding drum; The lead angle of first worm screw is less than the equivalent friction angle of first worm screw, the first worm gear meshing wheel between cog, and perhaps the lead angle of second worm screw is less than the equivalent friction angle of second worm screw, the second worm gear meshing wheel between cog.

After adopting said structure, the utility model compared with prior art, have the following advantages: because speed reduction gearing comprises first worm screw, first worm gear, with coaxial second worm screw of first worm gear, be provided with the output shaft of second worm gear, first worm screw and the engagement of first worm gear, second worm screw and the engagement of second worm gear; The mouth of described motor is connected with the input end of first worm screw, and the mouth of described output shaft is connected with the input end of winding drum; The lead angle of first worm screw is less than the equivalent friction angle of first worm screw, the first worm gear meshing wheel between cog, perhaps the lead angle of second worm screw is less than the equivalent friction angle of second worm screw, the second worm gear meshing wheel between cog, said structure promptly is provided with two groups of worm and gears in speed reduction gearing, wherein the existing worm gear of second worm screw also has worm screw, and worm-and-wheel gear has reliable and stable latching characteristics, the operation noise is little, transmission power is big, transmitting ratio is big, so can either serve as speed reduction gearing uses, can realize reliable and stable brake function again, and compact conformation, size is little, compared to existing technology, drive link and brake gear have all omitted.To sum up, the utlity model has advantage simple in structure, the brake good stability.

As improvement, the lead angle of first worm screw is less than the equivalent friction angle of first worm screw, the first worm gear meshing wheel between cog, and the lead angle of second worm screw is less than the equivalent friction angle of second worm screw, the second worm gear meshing wheel between cog, such two groups of worm and gears all can self-locking, more helps the raising of the reliability that brakes.

As further improvement, described speed reduction gearing is provided with and is used to stir the clutch driving lever that the 3rd gear moves along the output shaft axis direction, and the 3rd gear is separated with the 4th gear, and more convenient user uses.

As further improvement, the axis of machine shaft and the axis of winding drum are located along the same line, and like this, can reduce lateral dimension of the present utility model, more convenient being installed on the vehicle such as automobile.

Description of drawings

Fig. 1 is one of structural representation of the utility model electric capstan.

Fig. 2 be the utility model electric capstan structural representation two.

Fig. 3 is the structural representation of the speed reduction gearing of the utility model electric capstan.

Shown in the figure, 1, motor, 2, winding drum, 3, first worm screw, 4, first worm gear, 5, second worm screw, 6, second worm gear, 7, output shaft, 8, first gear, 9, second gear, the 10, the 3rd gear, the 11, the 4th gear, 12, clutch driving lever, 13, machine shaft, 14, support, 15, housing.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

The utility model electric capstan, it comprises motor 1, speed reduction gearing and winding drum 2, described speed reduction gearing comprises first worm screw 3, first worm gear 4, with coaxial second worm screw 5 of first worm gear 4, be provided with the output shaft 7 of second worm gear 6,

first worm screw

3 and 4 engagements of first worm gear,

second worm screw

5 and 6 engagements of second worm gear; The mouth of described motor 1 is connected with the input end of first worm screw 3, and the mouth of described output shaft 7 is connected with the input end of winding drum 2; The lead angle of first worm screw 3 is less than the equivalent friction angle of first worm screw, 3 first worm gears, 4 meshing wheel between cog, and perhaps the lead angle of second worm screw 5 is less than the equivalent friction angle of second worm screw, 5 second worm gears, 6 meshing wheel between cog.Concrete structure is shown in Fig. 1 or 2 or 3, and clear for diagrammatic sketch, Fig. 1 has removed a lid, has removed housing 15 among Fig. 2.

In this example, the lead angle of first worm screw 3 is less than the equivalent friction angle of first worm screw, 3 first worm gears, 4 meshing wheel between cog, and the lead angle of second worm screw 5 is less than the equivalent friction angle of second worm screw, 5 second worm gears, 6 meshing wheel between cog, the diaxon alternate angle of first worm screw 3 and first worm gear 4 is the right angle, and the diaxon alternate angle of second worm screw, 5 second worm gears 6 also is the right angle.

The mouth of described motor 1 is an end that is provided with the machine shaft 13 of first gear 8, the input end of described first worm screw 4 is an end that is provided with first worm screw 4 of second gear 9, and the mouth of described motor 1 is connected with the input end of first worm screw 3 and is meant described first gear 8 and the engagement of second gear 9.

The mouth of described output shaft 7 is an end that is provided with the output shaft 7 of the 3rd gear 10, the input end of described winding drum 2 is an end that is provided with the winding drum 2 of the 4th gear 11, and the mouth of described output shaft 7 is connected with the input end of winding drum 2 and is meant described the 3rd gear 10 and the engagement of the 4th gear 11.

Described speed reduction gearing is provided with and is used to stir the clutch driving lever 12 that the 3rd gear 10 moves along output shaft 7 axis directions.

The axis of the axis of machine shaft 13 and winding drum 2 is located along the same line.

In this example, described winding drum 2 is installed on the support 14, and described speed reduction gearing is installed in the housing 15, and described motor 1 is installed on the housing 15, and housing 15 is installed on the support 14.

Claims

1. electric capstan, it comprises motor, speed reduction gearing and winding drum, it is characterized in that, described speed reduction gearing comprises first worm screw, first worm gear, with coaxial second worm screw of first worm gear, be provided with the output shaft of second worm gear, first worm screw and the engagement of first worm gear, second worm screw and the engagement of second worm gear; The mouth of described motor is connected with the input end of first worm screw, and the mouth of described output shaft is connected with the input end of winding drum; The lead angle of first worm screw is less than the equivalent friction angle of first worm screw, the first worm gear meshing wheel between cog, and perhaps the lead angle of second worm screw is less than the equivalent friction angle of second worm screw, the second worm gear meshing wheel between cog.

2. a kind of electric capstan according to claim 1, it is characterized in that, the lead angle of first worm screw is less than the equivalent friction angle of first worm screw, the first worm gear meshing wheel between cog, and the lead angle of second worm screw is less than the equivalent friction angle of second worm screw, the second worm gear meshing wheel between cog.

3. a kind of electric capstan according to claim 1, it is characterized in that, the mouth of described motor is an end that is provided with the machine shaft of first gear, the input end of described first worm screw is an end that is provided with first worm screw of second gear, and the mouth of described motor is connected with the input end of first worm screw and is meant described first gear and second gear mesh.

4. a kind of electric capstan according to claim 1, it is characterized in that, the mouth of described output shaft is an end that is provided with the output shaft of the 3rd gear, the input end of described winding drum is an end that is provided with the winding drum of the 4th gear, and the mouth of described output shaft is connected with the input end of winding drum and is meant described the 3rd gear and the 4th gear mesh.

5. a kind of electric capstan according to claim 4 is characterized in that, described speed reduction gearing is provided with and is used to stir the clutch driving lever that the 3rd gear moves along the output shaft axis direction.

6. a kind of electric capstan according to claim 1 is characterized in that, the axis of machine shaft and the axis of winding drum are located along the same line.