CN214743071U

CN214743071U - Electric driving wheel with planetary speed reduction transmission

Info

Publication number: CN214743071U
Application number: CN202120394536.1U
Authority: CN
Inventors: 任中海
Original assignee: Ningbo Tuoke Transmission Co ltd
Current assignee: Ningbo Tuoke Transmission Co ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-11-16
Anticipated expiration: 2031-02-23

Abstract

The utility model discloses a driven electric drive wheel of planet speed reduction, including planetary reducer, DC motor, planet speed reduction internal gear casing, rubber tire, DC motor direct mount is on planetary reducer's second grade planet carrier, planetary reducer includes one-level planet carrier, three one-level planetary gear, an one-level sun gear and second grade planet carrier, a second grade sun gear and planet speed reduction internal gear casing, and the planet speed reduction drive chain through the external gearing-internal gearing converts DC motor's power into low-speed big moment of torsion power output to rubber tire. According to the electric driving wheel with the planetary reduction transmission, the high-speed stage of the planetary reducer adopts the planetary transmission floating technology, so that the uniform distribution of the load of the planetary gear with the high-speed stage planetary transmission is realized, the transmission noise is reduced, the use of a duplicate gear is avoided due to the adoption of the planetary transmission mode, the manufacturing precision of the gear is favorably improved, the manufacturing cost is reduced, and the electric driving wheel is more suitable for mass production.

Description

Electric driving wheel with planetary speed reduction transmission

Technical Field

The utility model relates to a drive wheel equipment technical field specifically is a planetary reduction's electric drive wheel.

Background

The self-walking electric driving wheel of the existing scissor-fork type aerial work vehicle mostly adopts a parallel shaft external-internal meshing gear transmission mode, a gear is processed on an output shaft of a direct current motor and is used as a power input gear, a motor shaft gear is meshed with a large gear of a duplicate gear, a small gear of the duplicate gear is meshed with another external gear, the external gear and the small gear are meshed with internal teeth of an internal gear ring at the same time to form an external meshing-internal meshing transmission chain, two groups of transmission chains are symmetrically arranged in the whole speed reducer, so that output torque of the direct current motor is amplified and then output to the internal gear ring, power is output to a tire through the internal gear ring, and the aerial work vehicle is driven to self-walk.

In order to make the external dimension more compact, the output shaft of the direct current motor must be processed into a gear shaft, the output rotating speed of the motor shaft is high, which is close to 3000 r/min, in order to reduce the noise of the transmission, the gear part of the gear shaft must have high precision and need to keep higher concentricity with two bearing positions on the motor shaft, the motor shaft belongs to a slender rod part in the mechanical structure, which increases the difficulty of the machining and the manufacturing cost. In order to ensure that the duplicate gear can be correctly installed in a transmission chain, strict requirements on the number of teeth of a large gear and a small gear of the duplicate gear are met, the number of teeth of the large gear and the number of teeth of the small gear need to be even, symmetrical lines of tooth grooves of the large gear and the small gear need to be strictly aligned, the difference between the number of teeth of the large gear and the number of teeth of the small gear and the distance between the small gear and the large gear are very close, the small gear needs to be subjected to gear shaping processing, the large gear can be subjected to gear shaping processing, but the efficiency is low, and the gear hobbing processing of the large gear needs to be performed by designing a complex tool to ensure that the symmetrical lines of the tooth grooves of the large gear and the small gear are aligned. The duplicate gear belongs to a hard tooth surface gear, gear grinding finish machining is needed after gear shaping and gear hobbing, the problem of symmetrical tooth flank grinding allowance exists during gear grinding, otherwise, the opposite positive of the tooth groove symmetry line of a large gear and a small gear can be damaged, and the problems of noise and abnormal sound in the transmission process are caused. These increase the difficulty of manufacture and the cost of manufacture without the use of large volume production. In addition, in the prior art, a full-sealing structure is difficult to achieve in the design structure, so that only lubricating grease can be filled in gear transmission and gear oil lubrication cannot be used, otherwise, the lubricating oil can leak outwards, and the possibility that external silt and water enter the inside of the speed reducer is increased due to the non-full-sealing structure, so that the speed reducer is damaged too early and cannot be maintained and used.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a planetary gear reduction's electric drive wheel to solve the direct current motor's of the current electric drive wheel that proposes in the above-mentioned background art output shaft must be processed into the gear shaft, the machining precision of gear shaft has decided gear drive's noise level, and has increaseed the processing degree of difficulty and manufacturing cost, not using mass production, prior art is difficult to accomplish full seal structure in the project organization in addition, lead to the too early damage of reduction gear and the unable problem technical problem of maintaining and using.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a driven electric drive wheel of planetary reduction, includes planetary reducer, DC motor, rubber tire, normal close formula electromagnetic braking ware and planetary reduction internal gear casing, and the rubber tire is fixed on planetary reduction internal gear casing, and DC motor direct mount is on planetary reducer's second grade planet carrier, planetary reducer includes one-level planet carrier, second grade planet carrier, first skeleton oil blanket, second skeleton oil blanket, planetary reduction internal gear casing, deep groove ball bearing, self-sealing bearing, one-level sun gear, second grade sun gear, three one-level planetary gear, three second grade planetary gear, three one-level planet axle and three second grade planet wheel axle, and planetary reduction drive chain through the external gearing-internal gearing converts DC motor's power into low-speed big moment of torsion power output to the rubber tire.

Preferably, the direct current motor is directly mounted on a secondary planet carrier of the planetary reducer, an output shaft of the direct current motor is supported through a self-sealing bearing, the self-sealing bearing is mounted in a bearing hole of the secondary planet carrier, a second framework oil seal is arranged on the output shaft of the direct current motor, and the output shaft of the direct current motor is connected with an internal spline of the primary sun gear through an external spline.

Preferably, the primary sun gear is externally engaged with the primary planet gears, the three primary planet gears are simultaneously internally engaged with the primary internal gear of the planetary reduction internal gear shell, and the three primary planet gears are arranged on the primary planet carrier through the primary planet gear shaft.

Preferably, the secondary sun gear is externally engaged with the secondary planet gears, the three secondary planet gears are simultaneously internally engaged with the secondary internal gear of the planetary reduction internal gear shell, the three secondary planet gears are arranged on the secondary planet carrier through a secondary planet gear shaft, and the secondary planet carrier is fixedly connected with equipment.

Preferably, two deep groove ball bearings are mounted in the planetary reduction inner gear shell, the planetary reduction inner gear shell is supported by the two deep groove ball bearings at two points, and inner rings of the two deep groove ball bearings are mounted on the secondary planet carrier.

Preferably, the secondary planet carrier is of an integrally cast structure, and serves as a supporting body of the secondary planet gear and a supporting seat of the whole electric driving wheel, and the output flange of the secondary planet carrier can be mounted and fixed on a steering axle of a driven machine.

Preferably, the output flange of the planetary reduction internal gear shell is connected with the rubber tire through a hub flange.

Preferably, install first skeleton oil blanket on the second grade planet carrier, the hole at planet speed reduction internal gear casing is installed in the outer lane of first skeleton oil blanket, install O shape circle between end cover and the planet speed reduction internal gear casing.

Preferably, a normally closed electromagnetic brake is arranged at the rear end of the direct current motor.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this planetary reduction's electric drive wheel, planetary reducer's high-speed level adopts the planetary transmission technique of floating, direct current motor's output shaft only need process into the external splines, planetary reducer's high-speed level sun gear passes through internal spline and external spline connection, the manufacturing degree of difficulty of motor output shaft has been reduced, high-speed level sun gear can be processed alone and can be processed alone, be convenient for realize higher gear precision, reduce driven noise, owing to adopt the planetary transmission mode, the use duplicate gear has been avoided, be favorable to improving the manufacturing accuracy of gear, reduce manufacturing cost, be suitable for mass production more.

2. This planetary reduction's electric drive wheel designs the complete seal structure that can accomplish reliably in structure, and gear drive's lubricated mode can adopt gear oil lubrication, and the convenient periodic replacement gear oil has improved the life of reduction gear greatly.

Drawings

Fig. 1 is a schematic view of the overall cross-sectional structure of the present invention.

In the figure: 1. A DC motor; 101. An output shaft; 2. A secondary planet carrier; 3. A deep groove ball bearing; 4. A secondary planetary gear; 5. A planetary reduction internal gear housing; 501. A primary inner gear; 502. A secondary inner gear; 6. A secondary planet wheel shaft; 7. A primary planetary gear; 8. An O-shaped ring; 9. An end cap; 10. A primary planet wheel shaft; 11. A primary planet carrier; 12. A primary sun gear; 13. A secondary sun gear; 14. A rubber tire; 15. A first framework oil seal; 16. A second framework oil seal; 17. Self-sealing a bearing; 18. A normally closed electromagnetic brake; 19. A hub flange.

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.

Referring to fig. 1, the present invention provides a technical solution: an electric driving wheel driven by planetary reduction comprises a planetary reducer, a direct current motor 1, a planetary reduction internal gear shell 5, a rubber tire 14 and a normally closed electromagnetic brake 18, wherein the rubber tire 14 is fixed on the planetary reduction internal gear shell 5, the direct current motor 1 is directly arranged on a secondary planet carrier 2 of the planetary reducer, the planetary reducer comprises a primary planet carrier 11, a secondary planet carrier 2, a first framework oil seal 15, a second framework oil seal 16, the planetary reduction internal gear shell 5, a deep groove ball bearing 3, a self-sealing bearing 17, a primary sun gear 12, a secondary sun gear 13, three primary planet gears 7, three secondary planet gears 4, three primary planet gear shafts 10 and three secondary planet gear shafts 6, the power of the direct current motor 1 is converted into low-speed high-torque power through an external engagement-internal engagement planetary reduction transmission chain and is output to the rubber tire 14.

Further, the direct current motor 1 is directly installed on the secondary planet carrier 2 of the planetary reducer, the output shaft 101 of the direct current motor 1 is supported by the self-sealing bearing 17, the self-sealing bearing 17 is installed in a bearing hole of the secondary planet carrier 2, the output shaft 101 of the direct current motor 1 is provided with the second framework oil seal 16, and the output shaft 101 of the direct current motor 1 is connected with the internal spline of the primary sun gear 12 through the external spline.

Furthermore, the primary sun gear 12 is externally engaged with the primary planet gear 7, the three primary planet gears 7 are simultaneously internally engaged with the primary inner gear 501 of the planetary reduction inner gear shell 5, the three primary planet gears 7 are arranged on the primary planet carrier 11 through the primary planet gear shaft 10, and the above components form a primary planet transmission assembly which adopts a full-floating load-balancing technology.

Further, the secondary sun gear 13 is externally engaged with the secondary planet gear 4, the three secondary planet gears 4 are simultaneously internally engaged with the secondary internal gear 502 of the internal gear housing 5, the three secondary planet gears 4 are mounted on the secondary planet carrier 2 through the secondary planet gear shaft 6, the secondary planet carrier 2 is fixedly arranged and non-rotatable, an externally engaged-internally engaged planetary transmission chain is also used in the secondary planetary transmission, the secondary sun gear 13, the secondary planet gears 4, the secondary planet carrier 2 and the secondary internal gear of the internal gear housing 5 form a secondary planetary transmission element, and compared with the primary planetary transmission assembly, the secondary planetary transmission assembly is characterized in that the secondary planet carrier 2 is fixed with a degree of freedom, and power is limited to be output to the tire 14 only through the internal gear housing 5.

Furthermore, two deep groove ball bearings 3 are arranged in the planetary reduction internal gear shell 5, the planetary reduction internal gear shell 5 is supported by the two deep groove ball bearings 3 at two points, and the inner rings of the two deep groove ball bearings 3 are arranged on the secondary planet carrier 2, the planetary speed reduction internal gear shell 5 is respectively supported by the two deep groove ball bearings 3 at two points, the radial force of the tire 14 to the planetary speed reduction internal gear shell 5 acts between the two supporting points of the bearings 3, the structural rigidity of the planetary transmission is increased, inner rings of the two bearings 3 are arranged on the secondary planet carrier 2, a gear transmission part of the electric driving wheel adopts a secondary planet transmission scheme that a planet speed reduction internal gear shell 5 rotates to output power, primary planet transmission adopts a floating load balancing technology, and the input power of the direct current motor 1 is output through power split of the two internal gears of the planet speed reduction internal gear shell 5.

Further, the secondary planet carrier 2 adopts an integral casting type structure, can be used as a supporting body of the secondary planet gear 4 and also can be used as a support of the whole electric driving wheel, and a hub flange 19 is arranged between the secondary planet carrier 2 and the rubber tire 14.

Further, the output flange of the planetary reduction internal gear housing 5 is connected with the rubber tire 14 through a hub flange 19.

Furthermore, a first framework oil seal 15 is installed on the second-stage planet carrier 2, the outer ring of the first framework oil seal 15 is installed in the inner hole of the planetary reduction gear shell 5, an O-shaped ring 8 is installed between the end cover 9 and the planetary reduction gear shell 5, the framework oil seal 15, the framework oil seal 16 and the O-shaped ring 8 form a full sealing structure for planetary gear transmission, and external water, silt and other impurities are effectively prevented from entering the planetary reducer.

Furthermore, a normally closed electromagnetic brake 18 is arranged at the rear end of the direct current motor 1, so that the reliable parking brake and the slope parking safety of the whole machine are ensured.

The working principle is as follows: the electric driving wheel comprises a rubber tire 14 connected with a rotating planetary reduction internal gear shell 5 and a reduction mechanism adopting secondary planetary gear transmission, wherein an output spline shaft of a direct current motor 1 directly drives the planetary reduction gear, the direct current motor 1 is directly arranged on a secondary planet carrier 2 of the whole planetary reduction gear, and the rear end of an output shaft of the direct current motor 1 is provided with a normally closed electromagnetic brake 18; the front bearing of the output shaft of the direct current motor 1 is a self-sealing bearing 17 which is directly arranged in a bearing hole of the secondary planet carrier 2, the self-sealing bearing 17 adopts a self-lubricating bearing, a second framework oil seal 16 is arranged on the output shaft of the direct current motor 1, the second framework oil seal 16 is also arranged on the secondary planet carrier 2, the output shaft of the direct current motor 1 is connected with the primary sun gear 12 through an external spline, and the primary sun gear 12 is driven to rotate to input power to the planet for speed reduction transmission. The primary sun gear 12 is externally engaged with the primary planet gear 7, the number of the primary planet gears 7 is 3, the primary planet gears 7 are arranged on a primary planet carrier 11 through a primary planet gear shaft 10, the primary planet gears 7 are simultaneously internally engaged with a primary inner gear 501 of the internal gear shell 5 of the planetary reduction gear, the primary planet gears 7 do revolution motion besides rotation motion, the primary planet carrier 11 is driven to rotate through the primary planet gear shaft 10 while revolving, the primary planet carrier 11 is connected with a secondary sun gear 13 through an internal spline so as to drive the secondary sun gear 13 to rotate, the secondary sun gear 13 is externally engaged with a secondary planet gear 4, the number of the secondary planet gears 4 is 3, the secondary planet gears are arranged on a secondary planet carrier 2 through a secondary planet gear shaft 6, the secondary planet gear 4 is simultaneously internally engaged with a secondary inner gear of the internal gear shell 5 of the planetary reduction gear, and the secondary planet carrier 2 is fixedly arranged on a machine frame, the planetary gear mechanism can not rotate, the freedom degree of a planetary carrier in planetary reduction transmission is limited, power is output to the planetary reduction internal gear shell 5 through the internal meshing transmission of the secondary planetary gear 4 and the secondary internal teeth of the planetary reduction internal gear shell 5, and the planetary reduction internal gear shell 5 is driven to rotate. An output flange of the planetary reduction internal gear shell 5 is connected with the rubber wheel 14 through a bolt, the rotating planetary reduction internal gear shell 5 is respectively supported by two deep groove ball bearings 3, the inner rings of the deep groove ball bearings 3 are arranged on a secondary planet carrier 2 of an integral casting structure, and the secondary planet carrier 2 is connected with a machine frame through a mounting flange; a framework oil seal 15 is arranged on the secondary planet carrier 2, the front end of the whole planetary gear transmission is sealed by an end cover 9, an O-shaped ring 8 is arranged on a matched mounting spigot of the end cover 9 and the planetary reduction gear shell 5, and the O-shaped ring 8, the framework oil seal 15 and the framework oil seal 16 form a reliable sealing structure for the planetary gear transmission so as to effectively prevent foreign materials such as external water, silt and the like from entering the interior of the speed reducer; because the design structure is reliable and the structure is fully sealed, the gear oil can be adopted for lubrication in a gear transmission lubrication mode, the gear oil can be conveniently and periodically replaced, and the service life and the maintainability of the speed reducer are greatly improved.

In the embodiments of the present application, the descriptions of the directional terms such as "front", "back", "left" and "right" are only described according to the directions shown in the drawings shown in the present application, and are not limited to the scope of the claims of the present application, and in the specific implementation process, other similar or similar embodiments may be obtained by correspondingly modifying the embodiments according to the embodiments, and all of the embodiments are within the scope of the present application, and the descriptions of the other similar or similar embodiments are not repeated in the present application.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

It should be finally noted that the above only serves to illustrate the technical solution of the present invention, and not to limit the scope of the present invention, and that simple modifications or equivalent replacements performed by those skilled in the art to the technical solution of the present invention do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. The utility model provides a driven electric drive wheel of planet speed reduction, includes planetary reducer, direct current motor (1), rubber tire (14), normal close formula electromagnetic brake (18) and planet speed reduction internal gear casing (5), its characterized in that: rubber tire (14) are fixed on planetary reduction internal gear casing (5), and direct current motor (1) direct mount is on planetary reducer's second grade planet carrier (2), planetary reducer includes one-level planet carrier (11), second grade planet carrier (2), first skeleton oil blanket (15), second skeleton oil blanket (16), planetary reduction internal gear casing (5), deep groove ball bearing (3), self-sealing bearing (17), one-level sun gear (12), second grade sun gear (13), three one-level planetary gear (7), three second grade planetary gear (4), three one-level planet wheel axle (10) and three second grade planet wheel axle (6), and the planetary reduction drive chain through the external gearing-internal gearing converts the power of direct current motor (1) into low-speed big moment of torsion power output to rubber tire (14).

2. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: direct current motor (1) direct mount is on planetary reducer's second grade planet carrier (2), output shaft (101) of direct current motor (1) support through self-sealing bearing (17), self-sealing bearing (17) are installed in the bearing hole of second grade planet carrier (2), be provided with second skeleton oil blanket (16) on direct current motor's (1) output shaft (101), direct current motor's (1) output shaft (101) are through the internal spline hookup of external splines with one-level sun gear (12).

3. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: the planetary reduction gear is characterized in that the primary sun gear (12) is externally engaged with the primary planet gear (7), the primary planet gear (7) is simultaneously internally engaged with a primary internal gear (501) of the planetary reduction internal gear shell (5), and the three primary planet gears (7) are arranged on a primary planet carrier (11) through a primary planet gear shaft (10).

4. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: the two-stage sun gear (13) is externally engaged with the two-stage planetary gear (4), the two-stage planetary gear (4) is simultaneously engaged with a two-stage internal gear (502) of the planetary reduction internal gear shell (5), the three two-stage planetary gear (4) is installed on the two-stage planet carrier (2) through a two-stage planetary gear shaft (6), and the two-stage planet carrier (2) is fixedly connected with equipment.

5. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: two deep groove ball bearings (3) are installed in the planetary reduction internal gear shell (5), the planetary reduction internal gear shell (5) is supported by the two deep groove ball bearings (3) at two points, and the inner rings of the two deep groove ball bearings (3) are installed on the secondary planet carrier (2).

6. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: the secondary planet carrier (2) adopts an integral casting structure, not only serves as a supporting body of the secondary planet gear (4), but also serves as a supporting seat of the whole electric driving wheel, and an output flange of the secondary planet carrier can be installed and fixed on a steering axle of a driven machine.

7. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: the output flange of the planetary reduction internal gear shell (5) is connected with the rubber tire (14) through a hub flange (19).

8. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: install first skeleton oil blanket (15) on second grade planet carrier (2), install in the hole of planet speed reduction internal gear casing (5) in the outer lane of first skeleton oil blanket (15), install O shape circle (8) between end cover (9) and planet speed reduction internal gear casing (5).

9. An electric drive wheel of planetary reduction transmission according to claim 1, characterized in that: and a normally closed electromagnetic brake (18) is arranged at the rear end of the direct current motor (1).