CN211127451U

CN211127451U - High-rotation-speed worm gear speed-reducing motor

Info

Publication number: CN211127451U
Application number: CN201922492912.6U
Authority: CN
Inventors: 高波; 高峰
Original assignee: Shenzhen Youyi Technology Co ltd
Current assignee: Shenzhen Youyi Technology Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-07-28
Anticipated expiration: 2029-12-30

Abstract

The utility model provides a high rotational speed worm gear reducing motor, the one end of its motor shaft stretches into in the speed reduction box and the interference is pegged graft in the inner circle of the oily powder metallurgy slide bearing that sets up in the reducing gear box, oily powder metallurgy slide bearing fixes on the casing of reducing gear box, be located to be equipped with a hollow worm on the motor shaft of reducing gear box, hollow worm is fixed on the motor shaft through a cylindric lock, be equipped with a plastics worm wheel subassembly in the speed reduction box, plastics worm wheel subassembly includes a plastics worm wheel and establishes outside output shaft and the output shaft on plastics worm wheel stretch out the reducing gear box, be equipped with the plastics gear in the plastics worm wheel periphery, be equipped with the rotatory external tooth of being connected with plastics gear engagement on the hollow worm, plastics worm wheel and hollow worm are at the internal cooperation installation of reducing gear box, the tail end of. This high rotational speed worm gear reduction motor adopts the worm gear transmission, and the intensity of worm gear can satisfy the operation requirement, and the transmission noise is little.

Description

High-rotation-speed worm gear speed-reducing motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a high rotational speed worm gear speed reduction motor.

Background

The direct current motor is widely used in household electrical appliances such as a household rice mill and a household garbage disposer, the structure of the direct current motor in the existing household rice mill is an umbrella-tooth speed reduction structure, and the noise of a gear is high under the condition of high rotating speed due to the speed reduction structure driven by the bevel gear, so that the noise control standard of the household electrical appliance cannot be reached.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a motor noise is little, with low costs high rotational speed worm gear reducer motor, this high rotational speed worm gear reducer motor adopts the worm gear transmission, and the POM material shaping is used to the worm wheel, and the gear modulus of worm gear adopts 2 moduli, and transmission noise is little.

The utility model is realized in such a way, a high-speed worm gear speed reducing motor comprises a direct current motor main body and a speed reducing box connected with the direct current motor main body, a motor shaft is arranged in the direct current motor main body, one end of the motor shaft extends into the speed reducing box and is inserted into an inner ring of an oil-containing powder metallurgy sliding bearing arranged in the speed reducing box in an interference manner, the oil-containing powder metallurgy sliding bearing is fixed on a shell of the speed reducing box, a hollow worm is arranged on the motor shaft positioned in the speed reducing box, the hollow worm is fixed on the motor shaft through a cylindrical pin, a plastic worm gear component is arranged in the speed reducing box, the plastic worm gear component comprises a plastic worm gear and an output shaft arranged on the plastic worm gear, the output shaft extends out of the speed reducing box, the plastic gear is arranged on the, the hollow worm is provided with rotating outer teeth which are meshed with the plastic gear, the plastic worm wheel and the hollow worm are installed in the reduction gearbox in a matching mode, and the other end of the motor shaft is fixed on a shell of the direct current motor main body in a D-shaped shaft mode.

Furthermore, a first supporting mechanism used for supporting the motor shaft is arranged in the direct current motor body and comprises a first bearing and a second bearing, one end of the motor shaft is inserted into an inner ring of the first bearing in an interference mode, an outer ring of the first bearing is fixed to a shell of the direct current motor body, the other end of the motor shaft is inserted into an inner ring of the second bearing in an interference mode, and an outer ring of the second bearing is fixed to the shell of the direct current motor body.

Furthermore, a second supporting mechanism used for supporting the output shaft is arranged in the reduction gearbox, the second supporting mechanism comprises a third bearing and a fourth bearing, one end of the output shaft is inserted into an inner ring of the third bearing in an interference mode, an outer ring of the third bearing is fixed to a shell of the reduction gearbox, the other end of the output shaft is inserted into an inner ring of the fourth bearing in an interference mode and extends out of the reduction gearbox, and an outer ring of the fourth bearing is fixed to the shell of the reduction gearbox.

Furthermore, the output shaft is sequentially sleeved with a first shaft elastic check ring, a second shaft elastic check ring and a third shaft elastic check ring, the first shaft elastic check ring and the second shaft elastic check ring are arranged in the reduction gearbox and are respectively arranged on two opposite sides of the third bearing and the fourth bearing, and the third shaft elastic check ring is arranged on the outer side of the shell of the reduction gearbox.

Further, the output shaft is provided with a first annular groove matched with the elastic check ring for the first shaft, a second annular groove matched with the elastic check ring for the second shaft and a third annular groove matched with the elastic check ring for the third shaft, the first elastic check ring is sleeved in the first annular groove, the second elastic check ring is sleeved in the second annular groove, and the third elastic check ring is sleeved in the third annular groove.

Further, the inner ring of the first circlip is attached to the inner surface of the first annular groove, the outer edge of the first circlip extends out of the outer periphery of the output shaft, the inner ring of the second circlip is attached to the inner surface of the second annular groove, the outer edge of the second circlip extends out of the outer periphery of the output shaft, the inner ring of the third circlip is attached to the inner surface of the third annular groove, and the outer edge of the third circlip extends out of the outer periphery of the output shaft.

Furthermore, a transmission cylindrical pin is further arranged on the output shaft outside the reduction gearbox.

The utility model has the advantages that: the utility model provides a high-speed worm gear speed reducing motor, one end of a motor shaft of the high-speed worm gear speed reducing motor extends into a speed reducing box and is inserted into an inner ring of an oil-containing powder metallurgy sliding bearing arranged in the speed reducing box in an interference manner, the oil-containing powder metallurgy sliding bearing is fixed on a shell of the speed reducing box, a hollow worm is arranged on the motor shaft and is fixed on the motor shaft through a cylindrical pin, a plastic worm gear component is arranged in the speed reducing box, the plastic worm gear component comprises a plastic worm gear and an output shaft arranged on the plastic worm gear, the output shaft extends out of the speed reducing box, the plastic worm gear is arranged on the periphery of the plastic worm gear, rotating outer teeth meshed and connected with the plastic gear are arranged on the hollow worm, the plastic worm gear and the hollow worm are installed in the speed reducing box in a matching manner, the plastic worm wheel is molded by using the POM material, the plastic gear arranged on the periphery of the plastic worm wheel and the gear module of the rotary external teeth arranged on the hollow worm are both 2 modules, so that the strength of the worm wheel and the worm can meet the use requirement, the transmission noise is low, and meanwhile, the material cost is also reduced to some extent, and the problem that the gear noise is high due to the fact that the bevel gear transmission speed reduction structure is adopted in the direct current motor structure of the existing household rice mill and under the condition of high rotating speed is solved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an overall schematic view of a high-speed worm gear speed reduction motor according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a high-speed worm gear and worm reduction motor according to an embodiment of the present invention.

Fig. 3 is another schematic structural diagram of a high-speed worm gear and worm reduction motor according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an output shaft of a high-speed worm gear speed reduction motor according to an embodiment of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides a high rotation speed worm gear speed reduction motor, which includes a dc motor main body 1 and a reduction box 2 connected to the dc motor main body 1, wherein a motor shaft 11 is disposed in the dc motor main body 1, one end of the motor shaft 11 extends into the reduction box 2 and is inserted into an inner ring of an oil-containing powder metallurgy sliding bearing 3 disposed in the reduction box 2 in an interference manner, the oil-containing powder metallurgy sliding bearing 3 is fixed on a housing of the reduction box 2, a hollow worm 4 is disposed on the motor shaft 12 located in the reduction box 2, the hollow worm 4 is fixed on the motor shaft 11 through a cylindrical pin 5, a plastic worm gear assembly 6 is disposed in the reduction box 2, the plastic worm gear assembly 6 includes a plastic worm wheel 61 and an output shaft 62 disposed on the plastic worm wheel 61, and the output shaft 62 extends out of the reduction box 2, the plastic worm wheel 61 is provided with a plastic gear on the periphery, the hollow worm 4 is provided with rotating external teeth meshed with the plastic gear, the plastic worm wheel 61 and the hollow worm 4 are installed in the reduction box 2 in a matching way, the high-speed worm wheel and worm reduction motor adopts worm wheel and worm transmission, because the transmission reduction ratio (4: 12) is that the plastic worm wheel 61 is formed by POM materials, the plastic gear arranged on the periphery of the plastic worm wheel 61 and the gear module of the rotating external teeth arranged on the hollow worm 4 both adopt 2 modules, therefore, the strength of the worm wheel and worm can meet the use requirement, the transmission noise is low, meanwhile, the material cost is also reduced, and the tail end of the motor shaft 11 is fixed on the shell of the direct current motor main body 1 in a D-shaped shaft mode.

It should be noted that, in this embodiment, the motor rotates 1300 revolutions after the speed reduction, and the torque force is 3N.M, that is, the rotation speed is high and the torque is large.

In this embodiment, a first supporting mechanism for supporting the motor shaft 11 is arranged in the dc motor main body 1, the first supporting mechanism includes a first bearing 12 and a second bearing 13, one end of the motor shaft 11 is inserted into an inner ring of the first bearing 12 in an interference manner, an outer ring of the first bearing 12 is fixed on a housing of the dc motor main body 1, the other end of the motor shaft 11 is inserted into an inner ring of the second bearing 13 in an interference manner, an outer ring of the second bearing 13 is fixed on the housing of the dc motor main body 1, and the first bearing 12 and the second bearing 13 can play a role in supporting the motor shaft 11.

In this embodiment, a second support mechanism for supporting the output shaft 62 is arranged in the reduction gearbox 2, the second support mechanism includes a third bearing 21 and a fourth bearing 22, one end of the output shaft 62 is inserted into an inner ring of the third bearing 21 in an interference manner, an outer ring of the third bearing 21 is fixed on a housing of the reduction gearbox 2, the other end of the output shaft 62 is inserted into an inner ring of the fourth bearing 22 in an interference manner and extends out of the reduction gearbox 2, an outer ring of the fourth bearing 22 is fixed on the housing of the reduction gearbox 2, and the third bearing 21 and the fourth bearing 22 can play a role in supporting the output shaft 62.

In this embodiment, the output shaft 62 is sequentially sleeved with the first shaft circlip 7, the second shaft circlip 8 and the third shaft circlip 9, the first shaft circlip 7 and the second shaft circlip 8 are both disposed in the reduction gearbox 2 and are respectively disposed on two opposite sides of the third bearing 21 and the fourth bearing 22, the third shaft circlip 9 is disposed on the outer side of the casing of the reduction gearbox 2, and the first shaft circlip 7, the second shaft circlip 8 and the third shaft circlip 9 all play a role in limiting the worm wheel assembly 6.

In this embodiment, the output shaft 62 is provided with a first annular groove 621 matching with the first shaft circlip 7, a second annular groove 622 matching with the second shaft circlip 8, and a third annular groove 623 matching with the third shaft circlip 9, the first circlip 7 is sleeved in the first annular groove 621, the second circlip 8 is sleeved in the second annular groove 622, and the third circlip 9 is sleeved in the third annular groove 623.

In this embodiment, the inner ring of the first circlip 7 is attached to the inner surface of the first annular groove 621, the outer edge of the first circlip 7 extends out of the outer periphery of the output shaft 62, the inner ring of the second circlip 8 is attached to the inner surface of the second annular groove 622, the outer edge of the second circlip 8 extends out of the outer periphery of the output shaft 62, the inner ring of the third circlip 9 is attached to the inner surface of the third annular groove 623, and the outer edge of the third circlip 9 extends out of the outer periphery of the output shaft 623.

In this embodiment, a transmission cylindrical pin 10 is further disposed on the output shaft 62 outside the reduction gearbox 2, and torque is transmitted through the transmission cylindrical pin 10.

The utility model has the advantages that: the utility model provides a high-speed worm gear speed reducing motor, one end of a motor shaft of the high-speed worm gear speed reducing motor extends into a speed reducing box and is inserted into an inner ring of an oil-containing powder metallurgy sliding bearing arranged in the speed reducing box in an interference manner, the oil-containing powder metallurgy sliding bearing is fixed on a shell of the speed reducing box, a hollow worm is arranged on the motor shaft and is fixed on the motor shaft through a cylindrical pin, a plastic worm gear component is arranged in the speed reducing box, the plastic worm gear component comprises a plastic worm gear and an output shaft arranged on the plastic worm gear, the output shaft extends out of the speed reducing box, the plastic worm gear is arranged on the periphery of the plastic worm gear, rotating outer teeth meshed and connected with the plastic gear are arranged on the hollow worm, the plastic worm gear and the hollow worm are installed in the speed reducing box in a matching manner, the plastic worm wheel is formed by POM materials, the plastic gear arranged on the periphery of the plastic worm wheel and the gear module of the rotary external teeth arranged on the hollow worm are both 2 modules, so that the strength of the worm wheel and the worm can meet the use requirement, the transmission noise is low, meanwhile, the material cost is also reduced, and the problem that the gear noise is great due to the fact that the bevel gear transmission speed reduction structure is adopted in the direct current motor structure of the existing household rice mill under the condition of high rotating speed is solved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A high-rotation-speed worm gear speed-reducing motor is characterized by comprising a direct-current motor main body and a speed reducing box connected with the direct-current motor main body, wherein a motor shaft is arranged in the direct-current motor main body, one end of the motor shaft extends into the speed reducing box and is inserted into an inner ring of an oil-containing powder metallurgy sliding bearing arranged in the speed reducing box in an interference manner, the oil-containing powder metallurgy sliding bearing is fixed on a shell of the speed reducing box, a hollow worm is arranged on the motor shaft positioned in the speed reducing box and is fixed on the motor shaft through a cylindrical pin, a plastic worm gear assembly is arranged in the speed reducing box and comprises a plastic worm gear and an output shaft arranged on the plastic worm gear, the output shaft extends out of the speed reducing box, the periphery of the plastic worm gear is provided with a plastic gear, and the hollow worm is provided with rotating external teeth meshed, the plastic worm wheel and the hollow worm are installed in the reduction gearbox in a matching mode, and the other end of the motor shaft is fixed on a shell of the direct current motor main body in a D-shaped shaft mode.

2. The high-speed worm and gear speed reducing motor according to claim 1, wherein a first supporting mechanism for supporting the motor shaft is provided in the dc motor main body, the first supporting mechanism includes a first bearing and a second bearing, one end of the motor shaft is inserted into an inner ring of the first bearing in an interference manner, an outer ring of the first bearing is fixed to the casing of the dc motor main body, the other end of the motor shaft is inserted into an inner ring of the second bearing in an interference manner, and an outer ring of the second bearing is fixed to the casing of the dc motor main body.

3. The high-speed worm and gear speed reduction motor according to claim 1, wherein a second support mechanism for supporting the output shaft is arranged in the reduction gearbox, the second support mechanism comprises a third bearing and a fourth bearing, one end of the output shaft is inserted into an inner ring of the third bearing in an interference manner, an outer ring of the third bearing is fixed on a shell of the reduction gearbox, the other end of the output shaft is inserted into an inner ring of the fourth bearing in an interference manner and extends out of the reduction gearbox, and an outer ring of the fourth bearing is fixed on the shell of the reduction gearbox.

4. The high-speed worm and gear reducer motor according to claim 3, wherein the output shaft is sleeved with a first shaft circlip, a second shaft circlip and a third shaft circlip in sequence, the first shaft circlip and the second shaft circlip are both arranged in the reduction gearbox and are respectively arranged on two opposite sides of the third bearing and the fourth bearing, and the third shaft circlip is arranged outside a shell of the reduction gearbox.

5. The high-speed worm-gear speed-reducing motor according to claim 4, wherein the output shaft is provided with a first annular groove, a second annular groove and a third annular groove in sequence, the first annular groove is matched with the first shaft elastic retainer ring, the second annular groove is matched with the second shaft elastic retainer ring, the third annular groove is matched with the third shaft elastic retainer ring, the first shaft elastic retainer ring is sleeved in the first annular groove, the second shaft elastic retainer ring is sleeved in the second annular groove, and the third shaft elastic retainer ring is sleeved in the third annular groove.

6. The high-speed worm-gear speed-reducing motor according to claim 5, wherein an inner ring of the first circlip for the shaft abuts against an inner surface of the first annular groove, an outer edge of the first circlip for the shaft extends out of an outer periphery of the output shaft, an inner ring of the second circlip for the shaft abuts against an inner surface of the second annular groove, an outer edge of the second circlip for the shaft extends out of the outer periphery of the output shaft, an inner ring of the third circlip for the shaft abuts against an inner surface of the third annular groove, and an outer edge of the third circlip for the shaft extends out of the outer periphery of the output shaft.

7. The high-speed worm and gear reducer motor according to claim 5, wherein a transmission cylindrical pin is further arranged on the output shaft outside the reduction box.