CN209860727U - Electrically-driven hub reduction system - Google Patents
Electrically-driven hub reduction system Download PDFInfo
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- CN209860727U CN209860727U CN201920869613.7U CN201920869613U CN209860727U CN 209860727 U CN209860727 U CN 209860727U CN 201920869613 U CN201920869613 U CN 201920869613U CN 209860727 U CN209860727 U CN 209860727U
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- motor
- gear
- planetary reduction
- reduction gear
- hub
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Abstract
The utility model discloses an electrically-driven wheel-side speed reduction system, which mainly comprises a wheel hub, a motor assembly and a gear box assembly; the gearbox assembly mainly comprises a motor mounting seat, an input sun gear, a primary planetary reduction gear set, a primary planetary reduction gear carrier, a coupling shaft and a secondary planetary reduction gear set; the primary planetary reduction gear set is meshed with the input sun gear; the primary planetary reduction gear carrier is sleeved on the motor shaft extension and is positioned between the input sun gear and the motor; the coupling shaft is of a hollow structure and is connected or fixedly connected with the first-stage planetary reduction gear carrier gear; a gear structure is arranged on the periphery of one end of the connecting shaft, and the secondary planetary reduction gear set is meshed with the gear structure; the gear box assembly is installed in the hub through a gear box supporting bearing, and a gear ring meshed with the secondary planetary reduction gear set is arranged in the hub. The utility model discloses compact structure is light and handy, has reduced the requirement to the output moment of torsion of motor, the overall arrangement of small-size electric drive aerial working platform of specially adapted.
Description
Technical Field
The utility model belongs to the technical field of mechanical transmission, concretely relates to specially adapted electric drive aerial working platform's an electricity drives wheel limit deceleration system.
Background
The traditional aerial work platform is a scaffold, and the scaffold obviously cannot meet the pursuit of people on work safety and high efficiency and also does not meet the trend of social technology development.
Some work places with high requirements on efficiency, cost and safety begin to adopt hydraulic-driven aerial work platforms, and although the hydraulic-driven aerial work platforms make up for the defects of scaffolds in various aspects, the hydraulic-driven aerial work platforms are still limited by certain working environments, for example, when the hydraulic-driven aerial work platforms work in cold environments in winter, the platform cars cannot be driven to work due to the fact that the driving liquid is increased in viscosity and poor in mobility.
The electrically-driven aerial work platform vehicle is not limited by a low-temperature environment, but the related technology of the electrically-driven aerial work platform, in particular to an electrically-driven wheel-side speed reducing system structure, has the defects of further improvement and promotion. For example, the gear box assembly has a small speed ratio range, a large volume and a complex structure, the interfaces between the gear box assembly and the motor and the hub are complex, the universality is poor, the assembly efficiency of the motor, the gear box assembly and the hub is low, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses just in order to optimize the electric wheel limit speed reduction system of small-size aerial working platform car, designed the layout structure of gear box assembly, improved the assembly interface between motor, gear box assembly and the wheel hub simultaneously, realized enlarging velocity ratio scope, reduce volume, promote targets such as assembly efficiency.
The utility model provides an electrically-driven wheel-side speed reduction system, which mainly comprises a wheel hub, a motor assembly and a gear box assembly;
the motor assembly mainly comprises a motor, and the motor is provided with a motor shaft extension;
the gearbox assembly mainly comprises a motor mounting seat, an input sun gear, a primary planetary reduction gear set, a primary planetary reduction gear carrier, a coupling shaft and a secondary planetary reduction gear set;
the motor shaft extends into the motor mounting seat and is mounted in the motor mounting seat through a motor supporting bearing;
the input sun gear is fixedly arranged at the end part of the motor shaft extension;
the primary planetary reduction gear set is disposed about and in meshing engagement with the input sun gear; each primary planetary reduction gear is arranged on a primary planetary reduction gear carrier through a gear shaft, and the primary planetary reduction gear carrier is sleeved on the motor shaft extension and is positioned between the input sun gear and the motor;
the coupling shaft is of a hollow structure and can be freely rotatably sleeved on the motor shaft extension; the coupling shaft is connected or fixedly connected with the gear of the primary planetary reduction gear carrier;
a gear structure is arranged on the periphery of one end, far away from the primary planetary reduction gear rack and close to the motor, of the coupling shaft, the secondary planetary reduction gear set is arranged around the gear structure, and the secondary planetary reduction gear set is meshed with the gear structure;
the gear box assembly is installed in the hub through a gear box supporting bearing, and a gear ring meshed with the secondary planetary reduction gear set is arranged in the hub.
Preferably, the motor further comprises a brake module mounted within an end cap of the non-shaft-extending end of the motor.
Further, a shell mounting flange of the motor is fixedly connected with the motor mounting seat through bolts.
Further, the input sun gear is fixedly mounted at the end of the motor shaft in a key slot selecting matching or spline matching mode.
Further, the secondary planetary reduction gear set is mounted on the motor mounting base through a secondary planetary reduction gear shaft.
Preferably, the ring gear is fitted to the inside of the hub by cold pressing.
Preferably, the gearbox support bearings are two and the ring gear is integrated on the hub at a position between the two gearbox support bearings.
Preferably, the motor support bearing and the gear box support bearing are deep groove ball bearings.
Preferably, a filling sealing member is arranged in a gap between the hub and the motor mounting seat; the packing seal is mounted on the hub.
Preferably, an oil seal is provided in a gap between the motor and the motor mount.
The utility model discloses electrically drive hub reduction system's overall structure has following advantage at least:
1. the motor assembly and the gear box assembly are modularized, and an interface between the motor assembly and the gear box assembly is standardized, so that the assembly efficiency is improved;
2. the primary planetary reduction gear assembly and the secondary planetary reduction gear assembly are matched through the connecting shaft, so that the axial structure of the gear box assembly is more compact, the transmission efficiency is high, a large speed ratio range can be realized, and the structure is easily expanded into a multi-stage planetary gear set structure;
3. the gear ring is integrated on the hub, so that the radial structure of the gear box assembly is more compact.
The utility model discloses an electricity drives wheel limit speed reduction system, compact structure, light and handy has reduced the requirement to the output moment of torsion of motor, specially adapted small-size electric drive aerial working platform's overall arrangement.
Drawings
FIG. 1 is a schematic, partially schematic, cross-sectional, structural view of an electrically driven wheel-side reduction system of the present invention;
fig. 2 is a schematic view of the working principle of the electrically driven wheel reduction system of the present invention.
Description of reference numerals:
1. a hub; 2. a drive motor; 21. extending a motor shaft; 22. a motor support bearing; 23. a brake module; 24. a terminal block; 3. a motor mounting seat; 4. an input sun gear; 5. a primary planetary reduction gear set; 6. a primary planetary reduction gear carrier; 7. a coupling shaft; 8. a secondary planetary reduction gear set; 9. a secondary planet reduction gear shaft; 10. a gearbox support bearing; 11. a hub end cap; 12. and filling the sealing member.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses an electricity drives hub reduction system mainly includes wheel hub 1, motor assembly and gear box assembly.
The motor assembly mainly comprises a motor 2. As shown in fig. 1, the motor 2 has a motor shaft extension 21 and a terminal block 24. The utility model discloses a motor 2 preferably adopts the electromagnetic braking motor that has stopper module 23 among the prior art (see hundred degrees encyclopedias), and stopper module 23 is installed in the end cover of the non-axle extension end of motor.
The gearbox assembly mainly comprises a motor mounting base 3, an input sun gear 4, a primary planetary reduction gear set 5, a primary planetary reduction gear carrier 6, a coupling shaft 7 and a secondary planetary reduction gear set 8.
The motor shaft extension 21 extends into the motor mounting seat 3 and is mounted in the motor mounting seat 3 through a motor support bearing 22; the shell mounting flange of the motor 2 is fixedly connected with the motor mounting seat 3 through bolts.
The input sun gear 4 is fixedly mounted at the end of the motor shaft extension 21, preferably in a spline or spline fit. A primary planetary reduction gear set 5 is disposed around the input sun gear 4 and meshes with the input sun gear 4. Each primary planetary reduction gear is arranged on a primary planetary reduction gear carrier 6 through a gear shaft, and the primary planetary reduction gear carrier 6 is sleeved on the motor shaft extension 21 and is positioned between the input sun gear 4 and the motor 2.
The coupling shaft 7 is a hollow structure and can be freely and rotatably sleeved on the motor shaft extension 21. The coupling shaft 7 is fixedly connected with the primary planetary reduction gear carrier 6 through a gear or by interference fit.
A gear structure is provided on the outer periphery of the coupling shaft 7 at an end thereof remote from the primary planetary reduction gear carrier 6 and close to the motor 2, around which a secondary planetary reduction gear set 8 is provided, and the secondary planetary reduction gear set 8 is engaged with the gear structure.
The secondary planetary reduction gear set 8 is mounted on the motor mounting base 3 through a secondary planetary reduction gear shaft 9.
The gearbox assembly is mounted inside the hub 1 by means of a gearbox support bearing 10 and inside the hub 1 there is provided a ring gear meshing with the secondary planetary reduction gear set 8, the ring gear being integrated inside the hub 1, as fitted to the inside of the hub 1, preferably by cold pressing. The gearbox support bearings 10 are preferably two and the ring gear is preferably integrated on the hub 1 at a position between the two gearbox support bearings 10.
Preferably, a hub end cover 11 is installed outside the hub 1, and the hub end cover 11 covers the motor shaft extension 21 and the gear box assembly.
Preferably, a filler seal 12 is provided in the gap between the hub 1 and the motor mount 3. The filling sealing member 12 is mounted on the wheel hub 1, but does not affect the rotation of the wheel hub 1 relative to the motor mounting seat 3, and has the functions of preventing the leakage of gear oil in the gear box, preventing dust, rain water or sundries from entering the gear box assembly and effectively isolating the running noise of the gear box assembly.
Preferably, the motor support bearing 22 and the gearbox support bearing 10 employ deep groove ball bearings.
Preferably, an oil seal is provided in the gap between the motor 2 and the motor mount 3.
The operation of the present invention will be described with reference to fig. 2.
The configuration shown in fig. 2 is the same as that of fig. 1, wherein the arrowed arc line indicates the direction of rotation and the arrowed broken line indicates the direction of power flow. Firstly, the motor assembly is electrified, the motor 2 drives the input sun gear 4 to rotate, and the input sun gear 4 is meshed with the primary planetary reduction gear set 5, so that the primary planetary reduction gear set 5 drives the primary planetary reduction gear carrier 6 to rotate; the primary planet reduction gear carrier 6 is in gear connection or fixed connection with a coupling shaft 7, and the coupling shaft 7 at the moment is equivalent to a secondary input sun gear; the coupling shaft 7 is engaged with the secondary planetary reduction gear set 8, the secondary planetary reduction gear set 8 is engaged with the ring gear on the hub 1, and the secondary planetary reduction gear set 8 drives the ring gear and the hub to rotate because the secondary planetary reduction gear set 8 is fixedly installed on the motor mounting base 3.
Those skilled in the art can achieve a gearbox assembly that meets the actual drive needs by setting the appropriate gear ratios.
To sum up, the utility model discloses an overall structure has following advantage at least: the motor assembly and the gear box assembly are modularized, and an interface between the motor assembly and the gear box assembly is standardized, so that the assembly efficiency is improved; the primary planetary reduction gear assembly and the secondary planetary reduction gear assembly are matched through the connecting shaft, so that the axial structure of the gear box assembly is more compact, the transmission efficiency is high, a large speed ratio range can be realized, and the structure is easily expanded into a multi-stage planetary gear set structure; the gear ring is integrated on the hub, so that the radial structure of the gear box assembly is more compact. The utility model discloses an electricity drives wheel limit speed reduction system compact structure, light and handy, has reduced the requirement to the output moment of torsion of motor, specially adapted small-size electric drive aerial working platform's overall arrangement.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The present invention is not limited to the above description of the embodiments, and those skilled in the art should be able to make modifications and alterations without creative work on the basis of the present invention.
Claims (10)
1. An electricity drives hub reduction system which characterized in that: mainly comprises a wheel hub, a motor assembly and a gear box assembly;
the motor assembly mainly comprises a motor, and the motor is provided with a motor shaft extension;
the gearbox assembly mainly comprises a motor mounting seat, an input sun gear, a primary planetary reduction gear set, a primary planetary reduction gear carrier, a coupling shaft and a secondary planetary reduction gear set;
the motor shaft extends into the motor mounting seat and is mounted in the motor mounting seat through a motor supporting bearing;
the input sun gear is fixedly arranged at the end part of the motor shaft extension;
the primary planetary reduction gear set is disposed about and in meshing engagement with the input sun gear; each primary planetary reduction gear is arranged on a primary planetary reduction gear carrier through a gear shaft, and the primary planetary reduction gear carrier is sleeved on the motor shaft extension and is positioned between the input sun gear and the motor;
the coupling shaft is of a hollow structure and can be freely rotatably sleeved on the motor shaft extension; the coupling shaft is connected or fixedly connected with the gear of the primary planetary reduction gear carrier;
a gear structure is arranged on the periphery of one end, far away from the primary planetary reduction gear rack and close to the motor, of the coupling shaft, the secondary planetary reduction gear set is arranged around the gear structure, and the secondary planetary reduction gear set is meshed with the gear structure;
the gear box assembly is installed in the hub through a gear box supporting bearing, and a gear ring meshed with the secondary planetary reduction gear set is arranged in the hub.
2. An electrically driven wheel-side reduction system according to claim 1, wherein:
the motor further comprises a brake module, and the brake module is installed in an end cover of the non-shaft-extension end of the motor.
3. An electrically driven wheel-side reduction system according to claim 2, wherein:
the shell mounting flange of the motor is fixedly connected with the motor mounting seat through bolts.
4. An electrically driven wheel-side reduction system according to claim 1, 2 or 3, wherein:
the input sun gear is fixedly arranged at the end part of the motor shaft extension in a key slot selecting matching or spline matching mode.
5. An electrically driven wheel-side reduction system according to claim 4, wherein:
and the secondary planetary reduction gear set is arranged on the motor mounting seat through a secondary planetary reduction gear shaft.
6. An electrically driven wheel-side reduction system according to claim 1, 2 or 3, wherein:
the gear ring is assembled to the inside of the hub by cold pressing.
7. An electrically driven wheel-side reduction system according to claim 1, 2 or 3, wherein:
the gear box support bearing is two, the ring gear is integrated on the wheel hub and is located at a position between the two gear box support bearings.
8. An electrically driven wheel-side reduction system according to claim 7, wherein:
the motor supporting bearing and the gear box supporting bearing are deep groove ball bearings.
9. An electrically driven wheel-side reduction system according to claim 1, wherein:
a filling sealing element is arranged in a gap between the hub and the motor mounting seat; the packing seal is mounted on the hub.
10. An electrically driven wheel-side reduction system according to claim 1, wherein:
and an oil seal is arranged in a gap between the motor and the motor mounting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920869613.7U CN209860727U (en) | 2019-06-11 | 2019-06-11 | Electrically-driven hub reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920869613.7U CN209860727U (en) | 2019-06-11 | 2019-06-11 | Electrically-driven hub reduction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209860727U true CN209860727U (en) | 2019-12-27 |
Family
ID=68942384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920869613.7U Active CN209860727U (en) | 2019-06-11 | 2019-06-11 | Electrically-driven hub reduction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209860727U (en) |
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2019
- 2019-06-11 CN CN201920869613.7U patent/CN209860727U/en active Active
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