CN211063483U

CN211063483U - Speed reducer of external rotating motor

Info

Publication number: CN211063483U
Application number: CN201921774632.8U
Authority: CN
Inventors: 郑胜巨
Original assignee: Guangdong Wanrui Electromechanical Technology Co ltd
Current assignee: Guangdong Wanrui Electromechanical Technology Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-07-21
Anticipated expiration: 2029-10-21

Abstract

The utility model relates to the technical field of motor reduction, in particular to a reduction gear of an external rotation motor, which comprises a bracket, a first shaft body arranged on the bracket, a stator arranged on the first shaft body, and an external rotor arranged by rotating with the first shaft body, wherein the external rotor is sleeved on the outer side of the stator; the transmission device comprises an outer rotor, a first shaft body, a bracket, a second shaft body, a transmission wheel and an output wheel, wherein the outer rotor is arranged on the bracket; on the premise of ensuring the outward rotating motor, the design of the speed reducing structure is simplified, the assembly efficiency of the speed reducing device is improved, and the output torque of the outward rotating motor is increased.

Description

Speed reducer of external rotating motor

Technical Field

The utility model relates to a motor speed reduction technical field especially discloses a decelerator of abversion formula motor.

Background

The motor is mainly divided into an inward rotation type structure and an outward rotation type structure, and under the condition of the same volume, the output power and the torsion of the outward rotation motor are increased by more than 30 percent compared with the inward rotation motor.

No matter the motor is outward rotated or inward rotated, if the other rotating mechanism is driven by direct driving, namely, the output shaft of the motor is directly connected with the rotating structure, the output torque is smaller at low speed, the motor is easy to generate heat, and the motor is burnt out due to poor heat dissipation.

In order to increase the output torque of the low-speed motor and avoid the motor from being burnt out due to untimely heat dissipation, a speed reducing mechanism is generally used for increasing the output torque, the speed reducing mechanism in the prior art is generally a single transmission body and then is connected with the motor through a connecting plate (flange plate), and the combination mode has large volume, high cost and high after-sale cost.

When the motor is in direct drive transmission, compared with the output torque of the motor with the speed reducer, the power of the motor needs to be increased by several times during the direct drive transmission to ensure that the power of the motor is the same as that of the motor with the speed reducer, and particularly when the motor needs to run at a low rotating speed and have high output torque, if the motor does not pass through the speed reducer, the power of the motor needs to be increased by several times if the motor wants to reach the preset output torque, so that the manufacturing cost of the motor can be greatly increased.

Under the requirements of low rotating speed and high output torque, the external rotation motor and the internal rotation motor are generally additionally provided with a speed reducer which is connected with a motor output shaft through a connecting disc, the speed reducer is added with larger volume, the internal speed reduction structure is complex, a plurality of eccentric shafts are required to be installed in the mechanism, several stages of transmission are installed to meet the requirements, the processing is complex, the cost is high, the size is large, the assembly efficiency is low, and the after-sale cost is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming and the deficiency that exist among the prior art, the utility model aims to provide a reduction gear of outer rotating motor simplifies speed reduction structure design, promotes reduction gear's assembly efficiency, increases the output torque of outer rotating motor.

In order to achieve the above object, the present invention provides a speed reducer of an external rotor motor, including a bracket, a first shaft body disposed on the bracket, a stator disposed on the first shaft body, and an external rotor rotatably disposed with the first shaft body, the external rotor being disposed outside the stator; the outer rotor is connected with the outer rotor, the driving wheel is provided with a first through hole penetrating through the driving wheel, the first shaft body penetrates through the driving wheel through the first through hole, the transition wheel is rotatably arranged on the bracket, the output wheel is rotatably sleeved on the outer side of the first shaft body, the output wheel is used for being connected with an external component, the driving wheel drives the output wheel to rotate through the transition wheel, and the radius of the driving wheel is smaller than that of the transition wheel.

The bracket is provided with a second shaft body, the transition wheel is arranged by rotating the second shaft body and the bracket, the transition wheel comprises a first wheel body and a second wheel body which are arranged on the second shaft body, the first wheel body is matched with the driving wheel for use, the radius of the first wheel body is larger than that of the driving wheel, the second wheel body is matched with the output wheel for use, the radius of the second wheel body is smaller than that of the first wheel body, and the radius of the second wheel body is smaller than that of the output wheel.

The bracket is movably provided with a bearing block, the second shaft body is rotatably arranged on the bearing block, and the movable bearing block drives the second shaft body to be close to or far away from the first shaft body.

The bearing block is arranged on the bracket in a sliding mode, the bracket is connected with an adjusting screw in a threaded mode, the adjusting screw and the bearing block are arranged in a rotating mode, and the rotating adjusting screw drives the bearing block to slide relative to the bracket.

The bearing block is provided with a second through hole penetrating through the bearing block, the outer side of the second shaft is sleeved with a first bearing, the first bearing is arranged on the bearing block and located in the second through hole, and the first wheel body and the second wheel body are located on two sides of the bearing block respectively.

The bracket comprises an underframe, a first vertical frame and a second vertical frame which are arranged on the same side of the underframe, the first vertical frame and the second vertical frame are arranged at intervals and in parallel, the first vertical frame and the second vertical frame are respectively connected with the first shaft body, the stator and the outer rotor are positioned between the first vertical frame and the second vertical frame, the driving wheel and the output wheel are respectively positioned on two sides of the first vertical frame, and the second shaft body is arranged on the first vertical frame.

The outer rotor comprises a cylinder, a first end cover, a second end cover and a plurality of magnets, the magnets are arranged on the inner side wall of the cylinder, the cylinder is sleeved on the outer side of the stator, the magnets are arranged around the stator, the first end cover and the second end cover are arranged at two ends of the cylinder respectively, the first end cover and the second end cover are respectively rotatably sleeved on the outer side of the first shaft, the driving wheel is arranged on the first end cover, and the stator and the driving wheel are respectively located on two sides of the first end cover.

The first end cover and the second end cover are respectively provided with a plurality of air holes penetrating through the end covers, the air holes expose the stator, the first end cover and the second end cover are respectively provided with a second bearing sleeved on the outer side of the first shaft body, and the first end cover and the driving wheel are of an integrated structure.

The driving wheel, the transition wheel and the output wheel are belt wheels, the driving wheel, the transition wheel and the output wheel are conveyed through an annular belt, and the driving wheel, the transition wheel and the output wheel are provided with annular blind grooves for accommodating the annular belt.

The driving wheel, the transition wheel and the output wheel are gears, the driving wheel is in meshing transmission with the transition wheel, and the transition wheel is in meshing transmission with the output wheel.

The utility model has the advantages that: when the device is actually used, the outer rotor drives the driving wheel to rotate together, the driving wheel drives the transition wheel to rotate, the transition wheel drives the output wheel to rotate, and the output wheel rotates to drive external components to rotate, so that the rotating speed of the outer rotor is reduced, and the output torque is increased; on the premise of ensuring the outward rotating motor, the design of the speed reducing structure is simplified, the assembly efficiency of the speed reducing device is improved, and the output torque of the outward rotating motor is increased.

Drawings

Fig. 1 is a front view of a first embodiment of the present invention;

fig. 2 is a schematic perspective view of a first embodiment of the present invention;

fig. 3 is an exploded schematic view of a first embodiment of the present invention;

fig. 4 is an exploded schematic view of a second embodiment of the present invention.

The reference numerals include:

1-bracket 2-first shaft body 3-stator

4-outer rotor 5-driving wheel 6-transition wheel

7-output wheel 8-second shaft 9-first wheel body

11-second wheel body 12-bearing block 13-adjusting screw

14-underframe 15-first vertical frame 16-second vertical frame

17-cylinder 18-first end cap 19-second end cap

And 21, air holes.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings, which are not intended to limit the present invention.

Example one

Please refer to fig. 1 to 3, the present invention provides an outward turning type motor speed reducer, which comprises a bracket 1, wherein the bracket 1 is made of metal material, a first shaft 2 is installed on the bracket 1, a stator 3 is installed on the first shaft 2, the stator 3 is fixedly connected with the first shaft 2, and an outer rotor 4 is rotatably arranged with the first shaft 2, the outer rotor 4 is sleeved on the outer side of the stator 3, a yielding gap is provided between the stator 3 and the outer rotor 4, so as to prevent the contact friction loss between the two.

The speed reducer further comprises a driving wheel 5, a transition wheel 6 and an output wheel 7, the driving wheel 5 is fixedly connected with the outer rotor 4, the rotating outer rotor 4 drives the driving wheel 5 to rotate together, the driving wheel 5 is provided with a first through hole penetrating through the driving wheel 5, the first shaft body 2 penetrates through the driving wheel 5 through the first through hole, preferably, the aperture of the first through hole is larger than the outer diameter of the first shaft body 2, contact friction loss between the driving wheel 5 and the first shaft body 2 is prevented, the transition wheel 6 is rotatably arranged on the bracket 1, the output wheel 7 is rotatably sleeved outside the first shaft body 2, preferably, the output wheel 7 is provided with a rolling bearing, the rolling bearing is sleeved outside the first shaft body 2, the output wheel 7 is fixedly connected to an external component, when the output wheel 7 rotates, the output wheel 7 can rotate together with the external component, and the driving wheel 5 drives the output wheel 7 to rotate through the transition wheel, the radius of the driving wheel 5 is smaller than that of the transition wheel 6, so that the speed reduction processing and the output torque increasing processing of the outer rotor 4 are realized.

When the device is actually used, the outer rotor 4 drives the driving wheel 5 to rotate together, the driving wheel 5 drives the transition wheel 6 to rotate, the transition wheel 6 drives the output wheel 7 to rotate, the output wheel 7 rotates to drive an external component to rotate, the speed reduction treatment of the rotating speed of the outer rotor 4 is realized, and the output torque is increased; on the premise of ensuring the outward rotating motor, the design of the speed reducing structure is simplified, the assembly efficiency of the speed reducing device is improved, and the output torque of the outward rotating motor is increased.

The bracket 1 is provided with a second shaft body 8, the second shaft body 8 and the first shaft body 2 are arranged in parallel at a distance, and the transition wheel 6 is arranged in a rotating way with the bracket 1 through the second shaft body 8. For example, the transition wheel 6 and the second shaft body 8 are rotationally arranged, and the second shaft body 8 is fixed on the bracket 1; of course, the second shaft 8 and the bracket 1 may be rotatably arranged, and the transition wheel 6 is fixed on the second shaft 8.

The transition wheel 6 comprises a first wheel body 9 and a second wheel body 11 which are arranged on a second shaft body 8, the first wheel body 9 is matched with the driving wheel 5 for use, the radius of the first wheel body 9 is larger than that of the driving wheel 5, the second wheel body 11 is matched with the output wheel 7 for use, the radius of the second wheel body 11 is smaller than that of the first wheel body 9, and the radius of the second wheel body 11 is smaller than that of the output wheel 7. The primary speed reduction is realized by the matching of the driving wheel 5 and the first wheel body 9, and the secondary speed reduction is realized by the matching of the second wheel body 11 and the output wheel 7, so that the output wheel 7 can have larger output torque. Of course, when the two-stage speed reduction cannot meet the torque requirement of the external connection member, the number of the second shaft bodies 8 and the number of the transition wheels 6 can be increased, and three-stage speed reduction, four-stage speed reduction and the like can be realized.

The movable bearing block 12 is movably arranged on the bracket 1, the second shaft body 8 is rotatably arranged on the bearing block 12, the movable bearing block 12 drives the second shaft body 8 to be close to or far away from the first shaft body 2, and further the distance between the driving wheel 5 and the first wheel body 9 and the distance between the second wheel body 11 and the output wheel 7 are changed, so that the radius of the transition wheel 6 or the radius of the output wheel 7 can be changed according to different speed reduction requirements, further the speed reduction treatment of the outer rotor 4 is changed, and various speed reduction requirements are met.

The bearing block 12 is arranged on the bracket 1 in a sliding mode, the adjusting screw 13 is screwed on the bracket 1, the adjusting screw 13 and the bearing block 12 are arranged in a rotating mode, and the rotating adjusting screw 13 drives the bearing block 12 to slide relative to the bracket 1. In practical use, when the distance between the driving wheel 5 and the transition wheel 6 or the distance between the transition wheel 6 and the output wheel 7 needs to be adjusted, a user rotates the adjusting screw 13, so that the adjusting screw 13 moves relative to the bracket 1, the moving adjusting screw 13 can drive the bearing block 12 to slide relative to the bracket 1, the sliding bearing block 12 drives the second shaft body 8 to move together, the second shaft body 8 moves to drive the transition wheel 6 to move, and the distance between the driving wheel 5 and the transition wheel 6 or the distance between the transition wheel 6 and the output wheel 7 is increased or reduced.

The bearing block 12 is provided with a second through hole penetrating through the bearing block 12, the outer side of the second shaft body 8 is sleeved with a first bearing, the first bearing is arranged on the bearing block 12 and located in the second through hole, abrasion between the bearing block 12 and the second shaft body 8 is reduced through arrangement of the first bearing, and the first wheel body 9 and the second wheel body 11 are located on the left side and the right side of the bearing block 12 respectively. The bearing block 12 is used for isolating the first wheel body 9 from the second wheel body 11, so that collision and interference of the two wheel bodies in the installation and use processes are avoided. Preferably, the thickness of the second wheel 11 is greater than that of the first wheel 9, so that the weight of the first wheel 9 is substantially equal to that of the second wheel 11, and poor use caused by uneven stress on two ends of the second shaft 8 is reduced.

The bracket 1 comprises an underframe 14, and a first vertical frame 15 and a second vertical frame 16 which are arranged on the same side of the underframe 14, wherein the first vertical frame 15 and the second vertical frame 16 are both arranged at the upper end of the underframe 14, the first vertical frame 15 and the second vertical frame 16 are arranged at intervals and in parallel, the first vertical frame 15 and the second vertical frame 16 are respectively connected with the first shaft body 2, the stator 3 and the outer rotor 4 are positioned between the first vertical frame 15 and the second vertical frame 16, on one hand, the first shaft body 2 is supported by the two vertical frames, so that the two ends of the first shaft body 2 are stressed approximately uniformly, and on the other hand, the stator 3 and the outer rotor 4 are limited by the two vertical frame stops. In this embodiment, the driving wheel 5 and the output wheel 7 are respectively located on the left and right sides of the first vertical frame 15, the bearing block 12 is installed on the first vertical frame 15, the second shaft body 8 is rotatably installed on the bearing block 12, and the second shaft body 8 penetrates through the first vertical frame 15.

The outer rotor 4 includes barrel 17, first end cap 18, second end cap 19 and a plurality of magnet, barrel 17 is roughly hollow cylindric, a plurality of magnet all install the setting on the inside wall of barrel 17, barrel 17 cover is established in the outside of stator 3, a plurality of magnet encircle stator 3 and set up, first end cap 18, second end cap 19 is installed respectively and is set up on barrel 17's both ends, first end cap 18, second end cap 19 rotates respectively and establishes in the outside of first axis body 2, action wheel 5 installs and sets up on first end cap 18, stator 3, action wheel 5 is located the left and right sides of first end cap 18 respectively.

The first end cover 18 and the second end cover 19 are both provided with a plurality of air holes 21 penetrating through the end covers, the stator 3 is exposed out of the air holes 21, and in the rotating process of the outer rotor 4, outside air flows through the air holes 21, so that heat is dissipated to the stator 3 and the outer rotor 4. Preferably, the plurality of ventilation holes 21 on the same end cover are arranged in an annular array around the rotation axis of the end cover, so that the vibration caused by the uneven weight distribution of the end cover in the rotation process is reduced. The first end cover 18 and the second end cover 19 are both provided with a second bearing sleeved outside the first shaft body 2, the end covers are provided with bearing holes, the second bearings are accommodated in the bearing holes, the bottom walls of the bearing holes are used for stopping and abutting against the second bearings, and the bearing holes are formed by recessing the side, close to each other, of the first end cover 18 and the second end cover 19. The first end cover 18 and the driving wheel 5 are of an integrated structure, secondary assembly of the first end cover 18 and the driving wheel 5 is not needed, and separation and falling of the first end cover 18 and the driving wheel 5 in the rotating process are avoided.

The driving wheel 5, the transition wheel 6 and the output wheel 7 are belt wheels, the driving wheel 5, the transition wheel 6 and the output wheel 7 are conveyed through an annular belt, and the driving wheel 5, the transition wheel 6 and the output wheel 7 are all provided with annular blind grooves for accommodating the annular belt. The annular blind groove is formed by concavely arranging the outer ring surfaces of the wheel body of the main driving wheel 5, the wheel body of the transition wheel 6 and the wheel body of the output wheel 7, and the annular belt is prevented from falling off from the driving wheel 5, the transition wheel 6 and the output wheel 7 by using the blocking annular belt pressed by the inner groove wall of the annular blind groove.

According to actual needs, the driving wheel 5, the transition wheel 6 and the output wheel 7 can also be gears, the driving wheel 5 is in meshing transmission with the transition wheel 6, and the transition wheel 6 is in meshing transmission with the output wheel 7.

Example two

Referring to fig. 4, in the present embodiment, the first shaft body 2 is fixedly connected with an external shaft core member, the output wheel 7 is rotatably sleeved on the outer side of the shaft core member, the output wheel 7 is installed and fixed on the roller, one end of the roller far away from the output wheel 7 is fixedly connected with an external member, and the central axis of the shaft core member coincides with the central axis of the external member.

The rest of this embodiment is the same as the first embodiment, and the unexplained features in this embodiment are explained by the first embodiment, which is not described herein again.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A speed reducer of an external rotor motor comprises a bracket, a first shaft body arranged on the bracket, a stator arranged on the first shaft body, and an outer rotor arranged in a way of rotating with the first shaft body, wherein the outer rotor is sleeved on the outer side of the stator; the method is characterized in that: the outer rotor is connected with the outer rotor, the driving wheel is provided with a first through hole penetrating through the driving wheel, the first shaft body penetrates through the driving wheel through the first through hole, the transition wheel is rotatably arranged on the bracket, the output wheel is rotatably sleeved on the outer side of the first shaft body, the output wheel is used for being connected with an external component, the driving wheel drives the output wheel to rotate through the transition wheel, and the radius of the driving wheel is smaller than that of the transition wheel.

2. The reduction gear of an external rotor motor according to claim 1, wherein: the bracket is provided with the second shaft body, crosses the ferryboat and rotates the setting with the bracket through the second shaft body, crosses the ferryboat and includes first wheel body and the second wheel body of installing in the second shaft body, and first wheel body cooperation action wheel is used, and the radius of first wheel body is greater than the radius of action wheel, and the second wheel body cooperation output wheel is used, and the radius of second wheel body is less than the radius of first wheel body, and the radius of second wheel body is less than the radius of output wheel.

3. The reduction gear of an external rotor motor according to claim 2, wherein: the bracket is movably provided with a bearing block, the second shaft body is rotatably arranged on the bearing block, and the movable bearing block drives the second shaft body to be close to or far away from the first shaft body.

4. The reduction gear of an external rotor motor according to claim 3, wherein: the bearing block is arranged on the bracket in a sliding mode, the bracket is connected with an adjusting screw in a threaded mode, the adjusting screw and the bearing block are arranged in a rotating mode, and the rotating adjusting screw drives the bearing block to slide relative to the bracket.

5. The reduction gear of an external rotor motor according to claim 3, wherein: the bearing block is provided with a second through hole penetrating through the bearing block, the outer side of the second shaft is sleeved with a first bearing, the first bearing is arranged on the bearing block and located in the second through hole, and the first wheel body and the second wheel body are located on two sides of the bearing block respectively.

6. The reduction gear of an external rotor motor according to claim 2, wherein: the bracket comprises an underframe, a first vertical frame and a second vertical frame which are arranged on the same side of the underframe, the first vertical frame and the second vertical frame are arranged at intervals and in parallel, the first vertical frame and the second vertical frame are respectively connected with the first shaft body, the stator and the outer rotor are positioned between the first vertical frame and the second vertical frame, the driving wheel and the output wheel are respectively positioned on two sides of the first vertical frame, and the second shaft body is arranged on the first vertical frame.

7. The reduction gear of an external rotor motor according to claim 1, wherein: the outer rotor comprises a cylinder body, a first end cover, a second end cover and a plurality of magnets, the magnets are arranged on the inner side wall of the cylinder body, the cylinder body is sleeved on the outer side of the stator, the magnets are arranged around the stator, the first end cover and the second end cover are arranged at two ends of the cylinder body respectively, the first end cover and the second end cover are respectively rotatably sleeved on the outer side of the first shaft body, the driving wheel is arranged on the first end cover, and the stator and the driving wheel are respectively located on two sides of the first end cover.

8. The reduction gear of an external rotor motor according to claim 7, wherein: the first end cover and the second end cover are respectively provided with a plurality of air holes penetrating through the end covers, the air holes expose the stator, the first end cover and the second end cover are respectively provided with a second bearing sleeved on the outer side of the first shaft body, and the first end cover and the driving wheel are of an integrated structure.

9. The reduction gear of an external rotor motor according to claim 1, wherein: the driving wheel, the transition wheel and the output wheel are belt wheels, the driving wheel, the transition wheel and the output wheel are conveyed by an annular belt, and the driving wheel, the transition wheel and the output wheel are all provided with annular blind grooves for accommodating the annular belt.

10. The reduction gear of an external rotor motor according to claim 1, wherein: the driving wheel, the transition wheel and the output wheel are gears, the driving wheel is in meshing transmission with the transition wheel, and the transition wheel is in meshing transmission with the output wheel.