CN113175503A - Reduction gearbox - Google Patents

Abstract

The invention discloses a reduction gearbox, which comprises a gear box, wherein a motor is fixed at one end of the gear box, a first-stage sun gear is fixed on a main shaft of the motor, a first annular inner gear is also fixed inside the gear box, a plurality of first-stage planet gears are meshed between the first-stage sun gear and the first annular inner gear, the first-stage planet gear shaft is rotatably arranged on the first-stage planet gear fixing flange, a second-stage sun gear is fixed on the first-stage planet gear fixing flange, a second annular inner gear surrounding the second-stage sun gear is fixed inside the gear box, a plurality of second-stage planet gears are meshed between the second-stage sun gear and the second annular inner gear, the second-stage planet gear shaft is rotatably arranged on the second-stage planet gear fixing flange, the first-stage planetary gear fixing flange and the second-stage planetary gear fixing flange are both processed by plastics. The invention has the advantages of low requirement on processing precision, low running noise, simple structure and long service life.

Description

Reduction gearbox

Technical Field

The invention relates to the field of mechanical transmission, in particular to a reduction gearbox with low machining precision requirement, low running noise, simple structure and long service life.

Background

The speed reducer is a power transmission mechanism, which uses a speed converter of a gear to reduce the revolution number of a motor to a required revolution number and obtain a mechanism with larger torque, and is widely used in mechanisms for transmitting power and motion. In mechanical transmission, it is increasingly desired to achieve high power and high transmission ratio output under the conditions of small size and light weight, and such requirements can be better satisfied by adopting a planetary gear epicyclic gear system. Generally, a planetary gear epicyclic gear train adopts a plurality of planetary gear structures, and each planetary gear is uniformly distributed around a sun gear. Therefore, a plurality of planet gears can be used for sharing load together, radial component force and centrifugal inertia force at each meshing position are balanced, and the running stability is improved.

Disclosure of Invention

In order to solve the problems, the invention aims to provide the reduction gearbox which has low requirement on processing precision, low running noise, simple structure and long service life.

The invention is realized by the following technical measures, the reduction gearbox comprises a gear box, one end of the gear box is fixedly provided with a motor, a main shaft of the motor is fixedly provided with a first-stage sun gear, a first annular inner gear surrounding the first-stage sun gear is fixedly arranged inside the gear box close to the motor, a plurality of first-stage planet gears are meshed between the first-stage sun gear and the first annular inner gear, the first-stage planet gears are respectively provided with a first-stage planet gear shaft, the first-stage planet gear shafts are rotatably arranged on a first-stage planet gear fixing flange, a second-stage sun gear is fixedly arranged on one surface of the first-stage planet gear fixing flange far away from the motor, a second-stage inner gear surrounding the second-stage sun gear is fixedly arranged inside the gear box, a plurality of second-stage planet gears are meshed between the second-stage sun gear and the second-stage inner gear, the second-stage planet gears are respectively provided with a second-stage planet gear shaft, the second-stage planetary gear shaft is rotatably arranged on the second-stage planetary gear fixing flange, a power output shaft is fixed on one surface, away from the motor, of the second-stage planetary gear fixing flange, and the first-stage planetary gear fixing flange and the second-stage planetary gear fixing flange are both formed by plastic processing.

As a preferable mode, a plurality of first clamping columns extend outwards in the radial direction of the first-stage annular inner teeth, first clamping grooves are respectively and axially formed in the inner wall of the gear box from the opening to the lower part of the gear box corresponding to the first clamping columns, the bottoms of the first clamping grooves surround the first-stage sun teeth, and the first clamping columns are clamped into the bottoms of the first clamping grooves in a matched mode; the gear box is characterized in that a plurality of second clamping columns extend outwards in the radial direction of the second-stage annular inner teeth, second clamping grooves are axially formed in the inner wall of the gear box corresponding to the second clamping columns from the opening downwards respectively, the bottoms of the second clamping grooves surround the second-stage sun teeth, and the second clamping columns are matched and clamped into the bottoms of the second clamping grooves.

As a preferred mode, the bottom of the first or second clamping groove is stepped, the first or second clamping column is clamped into the lower step of the first or second clamping groove, the higher step surface of the first or second clamping groove is provided with a screw hole, and the screw cap of the screw fastened in the screw hole abuts against the upper surface of the first or second clamping column, so that the first or second clamping column is fixedly clamped in the first or second clamping groove.

As a preferable mode, the stepped height at the bottom of the first or second slot is the same as the thickness of the first or second clip column.

As a preferable mode, the first card slots and the second card slots are arranged in a staggered and spaced manner.

Preferably, the first stage sun gear, the first ring inner gear, and the first stage planet gears are not finish machined; the second stage sun teeth, second ring inner teeth, and second stage planets are not finish machined.

Preferably, the number of the first-stage planetary gears and the second-stage planetary gears is four.

Preferably, the gear box is a plastic hollow skeleton type gear box.

Preferably, the gear box is externally sleeved with a metal reinforcing shell.

Preferably, the power output shaft is connected with a barrier gate rod

The first-stage planetary gear fixing flange and the second-stage planetary gear fixing flange are both processed by plastics, the wheel axle of the first-stage planetary gear or the wheel axle of the second-stage planetary gear is respectively and rotatably arranged on the first-stage planetary gear fixing flange or the second-stage planetary gear fixing flange, and the wheel axle of the first-stage planetary gear or the second-stage planetary gear runs between the first-stage sun gear and the first annular internal gear or between the second-stage sun gear and the second annular internal gear; because the first-stage planet gear fixing flange and the second-stage planet gear fixing flange are both processed by plastics, and the plastics have the functions of micro-deformation and buffering, even if the planet gears, the sun gears and the annular internal teeth have micro processing errors, the planet gears, the sun gears and the annular internal teeth can be perfectly meshed under the deformation of the plastic planet gear fixing flange in operation, thereby reducing the requirements on the processing precision of the planet gears, the sun gears and the annular internal teeth, reducing the processing cost, increasing the competitiveness of products, and simultaneously avoiding the noise in operation because the plastic planet gear fixing flange has the buffering function.

Drawings

FIG. 1 is a sectional view of a reduction gearbox according to an embodiment of the invention.

FIG. 2 is an exploded view of the reduction box according to the embodiment of the present invention.

FIG. 3 is a schematic view of an angle structure of a gearbox according to an embodiment of the present invention.

FIG. 4 is a schematic view of another angle structure of the gear box according to the embodiment of the present invention.

Fig. 5 is a schematic structural view of a planetary gear fixed flange embodying the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings.

Referring to fig. 1 to 5, the reduction gearbox of the present embodiment includes a gear box 15, a motor 17 is fixed at one end of the gear box 15, a first-stage sun gear 14 is fixed on a main shaft 16 of the motor 17, first ring-shaped internal teeth 12 surrounding the first-stage sun gear 14 are fixed inside the gear box 15 close to the motor 17, a plurality of first-stage planet gears 10 are engaged between the first-stage sun gear 14 and the first ring-shaped internal teeth 12, the first-stage planet gears 10 are all provided with first-stage planet gear shafts 20, the first-stage planet gear shafts 20 are rotatably arranged on a first-stage planet gear fixing flange 9, a second-stage sun gear 8 is fixed on one side of the first-stage planet gear fixing flange 9 far from the motor 17 through a first-stage flange 7, a second ring-shaped internal tooth 6 surrounding the second-sun gear 8 is fixed inside the gear box 15, a plurality of second-stage planet gears 4 are engaged between the second-stage sun gear 8 and the second ring-shaped internal tooth 6, the second-stage planet gears 4 are all provided with second-stage planet gear shafts 21, the second-stage planet gear shafts 21 are rotatably arranged on second-stage planet gear fixing flanges 3, power output shafts 2 are fixed on the surfaces, far away from the motor 17, of the second-stage planet gear fixing flanges 3, and the first-stage planet gear fixing flanges 9 and the second-stage planet gear fixing flanges 3 are both formed by plastic processing.

A first-stage planet gear fixing flange 9 and a second-stage planet gear fixing flange 3 of the reduction gearbox are both made of plastics, a first-stage planet gear shaft 20 or a second-stage planet gear shaft 21 are respectively and rotatably arranged on the first-stage planet gear fixing flange 9 or the second-stage planet gear fixing flange 3, a first-stage planet gear 10 runs between a first-stage sun gear 14 and a first annular inner tooth 12, and a second-stage planet gear 4 runs between a second-stage sun gear 8 and a second annular inner tooth 6; because the first-stage planet gear fixing flange 9 and the second-stage planet gear fixing flange 3 are both processed by plastics, and the plastics have the functions of micro-deformation and buffering, even if the planet gears, the sun gears and the annular internal teeth have small processing errors, the planet gears, the sun gears and the annular internal teeth can be perfectly meshed under the deformation of the plastic planet gear fixing flange in operation, thereby reducing the requirements on the processing precision of the planet gears, the sun gears and the annular internal teeth, reducing the processing cost, increasing the competitiveness of products, and simultaneously avoiding the noise in operation because the plastic planet gear fixing flange has the buffering function.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it may be further specifically that the first-stage annular internal teeth 12 radially extend outward to form a plurality of first clamping posts 11, the inner wall of the gear box 15 is provided with first clamping grooves 19 respectively axially downward from the opening corresponding to the first clamping posts 11, the bottoms of the first clamping grooves 19 surround the first-stage sun teeth 14, and the first clamping posts 11 are clamped into the bottoms of the first clamping grooves 19 in a matching manner; second level annular internal tooth 6 radially outwards extends has a plurality of second card posts 5, 15 inner walls of gear box correspond second card post 5 and from the opening part downwards respectively the axial be provided with second draw-in groove 18, outside second draw-in groove 18 bottom encircleed second level sun tooth 8, second card post 5 matches the card and goes into second draw-in groove 18 bottom. The structure that the clamping column is matched and clamped into the clamping groove is utilized, so that the product is assembled quickly and conveniently.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it may be further specifically that the bottom of the first or second clamping groove 19 or 18 is set to be stepped, the first or second clamping column 11 or 5 is clamped into a lower step of the first or second clamping groove 19 or 18, a screw hole is disposed on a higher step surface of the first or second clamping groove 19 or 18, and a nut of the screw 13 fastened in the screw hole presses against an upper surface of the first or second clamping column 11 or 5, so that the first or second clamping column 11 or 5 is fixedly clamped in the first or second clamping groove 19 or 18.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, specifically, the stepped height at the bottom of the first engaging groove 19 or the second engaging groove 18 may be the same as the thickness of the first engaging post 11 or the second engaging post 5.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it is specifically possible that the first card slots 19 and the second card slots 18 are arranged at intervals in a staggered manner.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it is also possible that none of the first-stage sun gear 14, the first ring-shaped inner gear 12 and the first-stage planet gears 10 are finished; the second-stage sun teeth 8, the second-stage internal ring teeth 6 and the second-stage planet gears 4 are not finished.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it may be further specific that the number of the first-stage planetary gears 10 and the second-stage planetary gears 4 is four.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it is further possible that the gearbox 15 is a plastic hollow skeleton type gearbox.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it is also possible that a metal reinforcing shell 1 is sleeved outside the gearbox 15.

In an embodiment of a reduction gearbox, please refer to fig. 1 to 5, based on the foregoing technical solution, it is also possible that the power output shaft 2 is connected to the barrier bar

The fast-releasing barrier of the present invention has been described above for helping understanding of the present invention, but the implementation manner of the present invention is not limited by the above-mentioned embodiments, and any changes, modifications, substitutions, combinations, and simplifications which do not depart from the principle of the present invention should be replaced by equivalent manners, and all such changes, modifications, substitutions, combinations, and simplifications are included in the scope of the present invention.

Claims (10)

1. A reduction box is characterized in that: comprising a gear box, gear box one end is fixed with the motor, be fixed with first order sun tooth on the main shaft of motor, the gear box is close to the inside of motor and is fixed with the first annular internal tooth that encircles first order sun tooth, the meshing has a plurality of first order planet gears between first order sun tooth and the first annular internal tooth, first order planet gear all is provided with first order planet tooth axle, first order planet tooth axle rotates and sets up on first order planet gear mounting flange, be fixed with second order sun tooth on the one side that first order planet gear mounting flange kept away from the motor, the inside of gear box is fixed with the second annular internal tooth that encircles second order sun tooth, the meshing has a plurality of second order planet gears between second order sun tooth and the second annular internal tooth, the second order planet gear all is provided with second order planet tooth axle, second order planet tooth axle rotates and sets up on second order planet gear mounting flange, and a power output shaft is fixed on one surface, far away from the motor, of the second-stage planetary gear fixing flange, and the first-stage planetary gear fixing flange and the second-stage planetary gear fixing flange are both formed by plastic processing.

2. The reduction gearbox according to claim 1, wherein: a plurality of first clamping columns extend outwards in the radial direction of the first-stage annular inner teeth, first clamping grooves are respectively and axially formed in the inner wall of the gear box from the opening to the lower part of the gear box corresponding to the first clamping columns, the bottoms of the first clamping grooves surround the first-stage sun teeth, and the first clamping columns are clamped into the bottoms of the first clamping grooves in a matched mode; the gear box is characterized in that a plurality of second clamping columns extend outwards in the radial direction of the second-stage annular inner teeth, second clamping grooves are axially formed in the inner wall of the gear box corresponding to the second clamping columns from the opening downwards respectively, the bottoms of the second clamping grooves surround the second-stage sun teeth, and the second clamping columns are matched and clamped into the bottoms of the second clamping grooves.

3. The reduction gearbox according to claim 2, wherein: the bottom of the first clamping groove or the bottom of the second clamping groove is stepped, the first clamping column or the second clamping column is clamped into the low order of the first clamping groove or the second clamping groove, a screw hole is formed in the high order surface of the first clamping groove or the second clamping groove, and the screw cap of the screw fastened in the screw hole is abutted against the upper surface of the first clamping column or the second clamping column, so that the first clamping column or the second clamping column is fixedly clamped in the first clamping groove or the second clamping groove.

4. A reduction gearbox according to claim 3, characterised in that: the stepped height at the bottom of the first clamping groove or the second clamping groove is the same as the thickness of the first clamping column or the second clamping column.

5. The reduction gearbox according to claim 1, wherein: the first clamping grooves and the second clamping grooves are arranged in a staggered and spaced mode.

6. The reduction gearbox according to claim 1, wherein: the first-stage sun gear, the first annular inner gear and the first-stage planet gear are not subjected to finish machining; the second stage sun teeth, second ring inner teeth, and second stage planets are not finish machined.

7. The reduction gearbox according to claim 1, wherein: the number of the first-stage planetary gears and the second-stage planetary gears is four.

8. The reduction gearbox according to claim 1, wherein: the gear box is a plastic hollow skeleton type gear box.

9. The reduction gearbox according to claim 1, wherein: and a metal reinforcing shell is sleeved outside the gear box.

10. The reduction gearbox according to claim 1, wherein: the power output shaft is connected with the barrier gate rod.

Images