CN212392764U - Speed reducing motor - Google Patents

Abstract

The utility model discloses a speed reducing motor, which comprises a motor body and a first speed reducing mechanism, wherein the first speed reducing mechanism is a planetary gear assembly; the motor body comprises a motor front flange and a motor shaft which extends forwards into the motor front flange along the axial direction; the first speed reducing mechanism comprises a high-speed planet carrier, the input end of the first speed reducing mechanism is connected to the motor shaft, and the high-speed planet carrier is the output end of the first speed reducing mechanism; the rear end of the high-speed planet carrier in the axial direction is rotationally connected to the radial outer side of the motor shaft through a first high-speed bearing and is rotationally connected to the radial inner side of the front flange of the motor through a second high-speed bearing. At least partial structures of the motor shaft, the high-speed planet carrier and the motor front flange are sequentially sleeved, the high-speed planet carrier is supported between the motor shaft and the motor front flange, the motor shaft and the high-speed planet carrier are not required to be completely staggered in the axial direction and are respectively connected with the motor front flange in a rotating mode through bearings, the axial length of the motor can be shortened, and the motor is compact in structure.

Description

Speed reducing motor

Technical Field

The utility model relates to the technical field of motors, in particular to gear motor.

Background

In the general industrial transmission field, after the motor shaft is connected with the speed reducer, the motor shaft and the planet carrier of the speed reducer are sequentially arranged along the axial direction and are respectively connected with the motor front flange of the motor through corresponding bearings, the mode increases the volume and the weight of the whole transmission system, and the power density under the unit volume is low.

Therefore, how to reduce the axial dimension of the reduction motor is a technical problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a speed reduction motor, which can effectively reduce the axial dimension of the speed reduction motor.

In order to achieve the above object, the utility model provides a following technical scheme:

a speed reducing motor comprises a motor body and a first speed reducing mechanism, wherein the first speed reducing mechanism is a planetary gear assembly; the motor body comprises a motor front flange and a motor shaft which extends forwards into the motor front flange along the axial direction; the first speed reducing mechanism comprises a high-speed planet carrier, the input end of the first speed reducing mechanism is connected to the motor shaft, and the high-speed planet carrier is the output end of the first speed reducing mechanism; the rear end of the high-speed planet carrier in the axial direction is rotationally connected to the radial outer side of the motor shaft through a first high-speed bearing, and is rotationally connected to the radial inner side of the motor front flange through a second high-speed bearing.

Preferably, the first speed reducing mechanism further includes a high-speed sun gear as an input end of the first speed reducing mechanism, and the high-speed sun gear is integrally formed at a front end of the motor shaft in the axial direction.

Preferably, the first speed reducing mechanism further comprises a high-speed annular gear, a high-speed planet gear and a high-speed planet shaft, and the high-speed planet carrier and the high-speed planet gear are both connected to the high-speed planet shaft; the high-speed inner gear ring is fixed on the motor front flange; the high-speed planet gear comprises a high-speed large gear and a high-speed small gear which are sequentially arranged along the axial direction, the high-speed large gear is in meshing transmission with the high-speed sun gear, and the high-speed small gear is in meshing transmission with the high-speed inner gear ring, so that the first speed reduction mechanism forms an NW type two-stage speed reduction planet gear.

Preferably, the high-speed planet carrier is rotationally connected with the high-speed planet shaft through a deep groove ball bearing.

Preferably, the speed reducer further comprises a second speed reducing mechanism which is a planetary gear assembly; the second speed reducing mechanism comprises a low-speed sun gear and a low-speed planet carrier, and the low-speed planet carrier is the output end of the second speed reducing mechanism; the low-speed sun gear is fixed on the low-speed input shaft; in the axial direction, the rear end of the low-speed input shaft, the front end of the high-speed planet carrier and the rear end of the low-speed planet carrier are sequentially sleeved outwards along the radial direction; the high-speed planet carrier is fixedly connected with the low-speed input shaft, and the high-speed planet carrier and the low-speed planet carrier can rotate relatively.

Preferably, the low-speed carrier is rotatably connected to a front housing through an outer low-speed bearing, and the front housing is fixed to the motor front flange.

Preferably, the outer low speed bearing is an angular contact ball bearing.

Preferably, the low-speed input shaft extends forwards into the low-speed carrier along the axial direction, and the low-speed input shaft is rotatably connected to the low-speed carrier through a front low-speed bearing.

Preferably, the second reduction mechanism further comprises a low-speed ring gear, a low-speed planet gear and a low-speed planet shaft; the low-speed inner gear ring is fixed on the radial inner surface of a front body shell, and the front body shell is fixed on the front flange of the motor; the low-speed planetary gear and the low-speed planet carrier are connected to the low-speed planet shaft; the low-speed planetary gear is meshed with the low-speed sun gear and the low-speed inner gear ring for transmission at the same time, so that the second speed reducing mechanism forms an NGW type planetary gear assembly.

Preferably, the motor body is a permanent magnet synchronous motor.

The utility model provides a speed reducing motor, which comprises a motor body and a first speed reducing mechanism, wherein the first speed reducing mechanism is a planetary gear assembly; the motor body comprises a motor front flange and a motor shaft which extends forwards into the motor front flange along the axial direction; the first speed reducing mechanism comprises a high-speed planet carrier, the input end of the first speed reducing mechanism is connected to the motor shaft, and the high-speed planet carrier is the output end of the first speed reducing mechanism; the rear end of the high-speed planet carrier in the axial direction is rotationally connected to the radial outer side of the motor shaft through a first high-speed bearing and is rotationally connected to the radial inner side of the front flange of the motor through a second high-speed bearing.

At least partial structures of the motor shaft, the high-speed planet carrier and the motor front flange are sequentially sleeved, the high-speed planet carrier is supported between the motor shaft and the motor front flange, the motor shaft and the high-speed planet carrier are not required to be completely staggered in the axial direction and are respectively connected with the motor front flange in a rotating mode through bearings, the axial length of the motor can be shortened, and the motor is compact in structure.

Drawings

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

Fig. 1 is a sectional view of the speed reduction motor provided by the present invention.

Reference numerals:

the motor comprises a motor shaft 1, a high-speed sun gear 101, a first high-speed bearing 2, a second high-speed bearing 3, a rear high-speed frame 4, a rear high-speed bearing 5, a high-speed gearwheel 6, a high-speed planet shaft 7, a front end cover 8, a high-speed inner gear ring 81, a front high-speed bearing 9, a front high-speed frame 10, a front shell 11, a low-speed inner gear ring 111, a needle bearing 12, a low-speed planet shaft 13, a low-speed sun gear 14, a low-speed input shaft 141, a front low-speed frame 15, a front low-speed bearing 16, a low-speed planet gear 17, an outer low-speed bearing 18, a high-speed pinion 19, a rear low-speed frame 20, a motor front.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a gear motor, can effectively contract gear motor's axial dimension.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. It should be noted that the terms "center", "front", "rear", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. In addition, the axial direction coincides with the front-rear direction unless otherwise specified. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The utility model provides a in the embodiment of gear motor, including motor body and first reduction gears. The motor body comprises a motor front flange 21 and a motor shaft 1 which axially extends forwards into the motor front flange 21. The first speed reducing mechanism is a planetary gear assembly and specifically comprises a high-speed sun gear 101, a high-speed planet wheel, a high-speed inner gear ring 81, a high-speed planet shaft 7 and a high-speed planet carrier, wherein the high-speed sun gear 101 is an input end of the first speed reducing mechanism, and the high-speed planet carrier is an output end of the first speed reducing mechanism.

High-speed sun gear 101 is fixed cup joint on motor shaft 1, preferred integrated into one piece in motor shaft 1 at axial ascending front end to directly regard motor shaft 1 as first reduction gears's input shaft, save the shaft coupling that is used for connecting motor shaft 1 and reduction gear input among the prior art, can reduce motor axial dimensions.

The rear end of the high-speed planet carrier in the axial direction is rotatably connected to the outer side of the motor shaft 1 in the radial direction through a first high-speed bearing 2, and the rear end of the high-speed planet carrier in the axial direction is rotatably connected to the inner side of the motor front flange 21 in the radial direction through a second high-speed bearing 3. The first high-speed bearing 2 and the second high-speed bearing 3 are deep groove ball bearings. The motor shaft 1, the high-speed planet carrier and the motor front flange 21 are sequentially sleeved, the high-speed planet carrier is supported between the motor shaft 1 and the motor front flange 21, two sections of completely separated spaces do not need to be reserved in the axial direction for the motor shaft 1 and the high-speed planet carrier to be respectively connected through the bearing in a rotating mode, the axial length of the motor can be shortened, and the motor is compact in structure.

Wherein, preferably, for the convenience of assembly, the high-speed planet carrier specifically comprises a front high-speed carrier 10 and a rear high-speed carrier 4 located at the rear side of the front high-speed carrier 10, the front high-speed carrier 10 and the rear high-speed carrier 4 are fixedly connected through bolts, then the front end of the high-speed planet carrier in the axial direction is located on the front high-speed carrier 10, the rear end of the high-speed planet carrier in the axial direction is located on the rear high-speed carrier 4, more specifically, the motor shaft 1 axially passes through the center of the rear high-speed carrier 4 forward, the first high-speed bearing 2 is installed between the motor shaft 1 and the rear high-speed carrier 4, the rear high-speed carrier 4 is located at the inner side of the motor front flange 21 in the radial direction, and.

The high speed ring gear 81 is fixed to the motor front flange 21. Specifically, the high-speed ring gear 81 is integrally formed on a radially inner surface of an annular front end cover 8, and the front end cover 8 is fixed to the front side of the motor front flange 21.

The high-speed planet wheel comprises a high-speed gearwheel 6 and a high-speed pinion 19 which are sequentially arranged along the axial direction, and the diameter of the high-speed gearwheel 6 is larger than that of the high-speed pinion 19. The high-speed planet carrier and the high-speed planet wheel are connected to the high-speed planet shaft 7, specifically, the high-speed gearwheel 6 is fixed on the high-speed planet shaft 7 in a shrink fit manner, the high-speed pinion 19 is integrally formed at the middle section of the high-speed planet shaft 7, and the high-speed pinion 19 is positioned at the front side of the high-speed gearwheel 6. The high-speed gearwheel 6 is in meshing transmission with the high-speed sun gear 101, and the high-speed pinion gear 19 is in meshing transmission with the high-speed ring gear 81, so that the first reduction mechanism forms an NW type two-stage reduction planetary gear. The first reduction mechanism is provided as an NW type two-stage reduction planetary gear, and two-stage reduction can be realized by one first reduction mechanism, so that reduction efficiency can be improved.

Preferably, the high-speed planet carrier is rotationally connected with the high-speed planet shaft 7 through a deep groove ball bearing, so that the friction coefficient is small, and the limit rotating speed is high. Specifically, the front end of the high-speed planetary shaft 7 is rotatably connected with the front high-speed frame 10 through a front high-speed bearing 9 on the radial outer side, the rear end of the high-speed planetary shaft 7 is rotatably connected with the rear high-speed frame 4 through a rear high-speed bearing 5 on the radial outer side, and the front high-speed bearing 9 and the rear high-speed bearing 5 are both deep groove ball bearings.

On the basis of the above embodiment, the reduction motor further includes a second reduction mechanism. The second reduction gear is a planetary gear assembly, and specifically includes a low-speed sun gear 14, a low-speed carrier, a low-speed ring gear 111, a low-speed planetary gear 17, and a low-speed planetary shaft 13. The low-speed planet carrier is the output end of the second speed reducing mechanism and is also the output end of the speed reducing motor.

The low-speed sun gear 14 is fixed to the low-speed input shaft 141, and the rear end of the low-speed input shaft 141 in the axial direction, the front end of the high-speed carrier in the axial direction, and the rear end of the low-speed carrier in the axial direction are sequentially sleeved outward in the radial direction. Specifically, the front end of the high-speed carrier is fixed to the outside of the rear end of the low-speed input shaft 141 in a sleeve manner, and more specifically, the front high-speed carrier 10 is fixed to the rear end of the low-speed input shaft 141 in a shrink fit manner. In addition, the front end of the high-speed planet carrier extends into and is supported on the inner side of the rear end of the low-speed planet carrier in the radial direction, the high-speed planet carrier and the low-speed planet carrier can rotate relatively, specifically, a certain gap can exist between the front end of the high-speed planet carrier and the rear end of the low-speed planet carrier in the radial direction, so that the high-speed planet carrier and the low-speed planet carrier with different rotating speeds can smoothly rotate respectively, or the front end of the high-speed planet carrier and the rear end of the low-speed planet carrier are rotationally connected through a bearing. The high-speed planet carrier extends into the low-speed planet carrier, can support the low-speed planet carrier and can also be supported by the low-speed planet carrier, the high-speed planet carrier and the low-speed planet carrier do not need to be axially separated and then are respectively supported, and the axial size of the motor can be further reduced.

The low-speed carrier is rotatably connected in the front body housing 11 through an outer low-speed bearing 18, that is, the low-speed carrier, the outer low-speed bearing 18 and the front body housing 11 are arranged in sequence from inside to outside in the radial direction. The outer low-speed bearing 18 is specifically an angular contact ball bearing. The front housing 11 is fixed to a motor front flange 21, and specifically, the front housing 11, the front end cover 8, and the motor front flange 21 are sequentially connected from front to back in the axial direction. The low-speed carrier is coupled in the front case 11 by a bearing, so that the stability of the rotation of the low-speed carrier can be ensured.

For the convenience of assembly, the low-speed carrier preferably includes a front low-speed carrier 15 and a rear low-speed carrier 20 located at the rear side of the front low-speed carrier 15, the front low-speed carrier 15 and the rear low-speed carrier 20 are fixedly connected by bolts, so that the front end of the low-speed carrier in the axial direction is located on the front low-speed carrier 15, and the rear end of the low-speed carrier in the axial direction is located on the rear low-speed carrier 20. Specifically, the outer low-speed bearings 18 are connected between the front low-speed frame 15 and the front housing 11, and between the rear low-speed frame 20 and the front housing 11.

Preferably, the low-speed input shaft 141 extends forward into the low-speed carrier along the axial direction, and the low-speed input shaft 141 is rotatably connected to the low-speed carrier, specifically, a deep groove ball bearing, through the front low-speed bearing 16. Specifically, the front end of the low-speed input shaft 141 extends into a hollow position of the front low-speed frame 15, and the front low-speed bearing 16 is installed therebetween. The low-speed input shaft 141 and the low-speed planet carrier are connected by a bearing, so that the low-speed input shaft 141 can be used for supporting the low-speed planet carrier from the radial inner side, other inner support structures do not need to be arranged, and the bearing distance of the motor shaft 1 can be further shortened.

The low-speed ring gear 111 is fixed to a radially inner surface of the front case 11, and specifically, the low-speed ring gear 111 is integrally formed on the radially inner surface of the front case 11. The low-speed planetary gear 17 is provided on the low-speed planetary shaft 13, and specifically, the low-speed planetary gear 17 is rotatably coupled to the low-speed planetary shaft 13 through a needle bearing 12. The low-speed carrier is connected to the low-speed planetary shaft 13. The low-speed planetary gear 17 is in meshing transmission with both the low-speed sun gear 14 and the low-speed ring gear 111, so that the second reduction mechanism constitutes an NGW type planetary gear assembly. The NGW type planetary gear assembly is in a three-stage speed reduction area, power is transmitted to the low-speed sun gear 14 through the high-speed planet carrier, the low-speed sun gear 14 drives the low-speed planet gear 17, the low-speed planet gear 17 drives the low-speed planet carrier to rotate through the low-speed planet shaft 13, and finally the low-speed planet gear is output outwards through the low-speed planet carrier.

On the basis of the above embodiment, the motor body is a permanent magnet synchronous motor, the permanent magnet synchronous motor has small volume, light weight and high efficiency, and the miniaturization and the light weight of the whole transmission system can be realized by combining an NW type series NGW type three-stage speed reducer.

In this embodiment, the NW-type planetary reducer as the high-speed stage is connected in series with the NGW-type planetary reducer as the low-speed stage to form a three-stage reduction mechanism, the three-stage reduction mechanism is built in the permanent magnet synchronous motor to form a high-power and high-density integrated reduction integrated motor, a coupling between a motor shaft and a first reduction mechanism is eliminated, and the motor shaft 1 is directly used as an input shaft of the three-stage reduction mechanism; the internal speed reducers at all levels of the three-level speed reducing mechanism are mutually supported, specifically, the motor shaft 1 uses a high-speed planet carrier as a support, the high-speed planet carrier uses a low-speed planet carrier and a motor front flange 21 as a support, the axial distance of the motor can be reduced, the structure is compact, the weight and the size of a transmission system are reduced, the miniaturization and the light weight of the whole transmission system are realized, the power density is improved under the condition of limited size, the quality of the whole machine is reduced, the requirement of the existing working condition is met, and the transmission precision is high.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above the utility model provides a gear motor has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. A speed reducing motor is characterized by comprising a motor body and a first speed reducing mechanism, wherein the first speed reducing mechanism is a planetary gear assembly; the motor body comprises a motor front flange (21) and a motor shaft (1) which extends forwards into the motor front flange (21) along the axial direction; the first speed reducing mechanism comprises a high-speed planet carrier, the input end of the first speed reducing mechanism is connected to the motor shaft (1), and the high-speed planet carrier is the output end of the first speed reducing mechanism; the rear end of the high-speed planet carrier in the axial direction is rotationally connected to the radial outer side of the motor shaft (1) through a first high-speed bearing (2), and is rotationally connected to the radial inner side of the motor front flange (21) through a second high-speed bearing (3).

2. The reduction motor according to claim 1, wherein the first reduction mechanism further includes a high-speed sun gear (101) as an input end of the first reduction mechanism, the high-speed sun gear (101) being integrally formed at a front end of the motor shaft (1) in the axial direction.

3. The reduction motor according to claim 2, wherein the first reduction mechanism further comprises a high-speed ring gear (81), a high-speed planetary gear, and a high-speed planetary shaft (7), the high-speed planetary gear and the high-speed planetary gear being connected to the high-speed planetary shaft (7); the high-speed inner gear ring (81) is fixed on the motor front flange (21); the high-speed planetary gear comprises a high-speed large gear (6) and a high-speed small gear (19) which are sequentially arranged along the axial direction, the high-speed large gear (6) is in meshing transmission with the high-speed sun gear (101), and the high-speed small gear (19) is in meshing transmission with the high-speed inner gear ring (81), so that the first speed reduction mechanism forms an NW type two-stage speed reduction planetary gear.

4. Geared motor according to claim 3, characterized in that the high-speed planet carrier is rotationally connected to the high-speed planet shaft (7) by means of deep groove ball bearings.

5. The reduction motor according to claim 1, further comprising a second reduction mechanism that is a planetary gear assembly; the second speed reducing mechanism comprises a low-speed sun gear (14) and a low-speed planet carrier, and the low-speed planet carrier is the output end of the second speed reducing mechanism; the low-speed sun gear (14) is fixed on the low-speed input shaft (141); in the axial direction, the rear end of the low-speed input shaft (141), the front end of the high-speed planet carrier and the rear end of the low-speed planet carrier are sequentially sleeved outwards along the radial direction; the high-speed planet carrier is fixedly connected with the low-speed input shaft (141), and the high-speed planet carrier and the low-speed planet carrier can rotate relatively.

6. Geared motor according to claim 5, characterized in that the low-speed carrier is rotatably connected to a front body shell (11) by means of an outer low-speed bearing (18), the front body shell (11) being fixed to the motor front flange (21).

7. Geared motor according to claim 6, characterized in that the outer low-speed bearing (18) is an angular contact ball bearing.

8. The gearmotor of claim 5, wherein the low-speed input shaft (141) projects axially forward into the low-speed carrier, and the low-speed input shaft (141) is rotationally connected to the low-speed carrier by a forward low-speed bearing (16).

9. The geared motor according to claim 5, wherein the second reduction mechanism further comprises a low-speed ring gear (111), low-speed planetary gears (17), and low-speed planetary shafts (13); the low-speed inner gear ring (111) is fixed on the radial inner surface of a front body shell (11), and the front body shell (11) is fixed on the motor front flange (21); the low-speed planetary gear (17) and the low-speed planet carrier are both connected to the low-speed planet shaft (13); the low-speed planetary gear (17) is simultaneously in meshing transmission with the low-speed sun gear (14) and the low-speed inner gear ring (111) so that the second speed reducing mechanism forms an NGW type planetary gear assembly.

10. The reduction motor according to any one of claims 1 to 9, wherein the motor body is a permanent magnet synchronous motor.

Images