CN219692237U - Planetary transmission structure convenient to dismouting - Google Patents

Abstract

The utility model relates to a planetary transmission structure convenient to disassemble and assemble, which is particularly suitable for silage cutting tables and belongs to the technical field of gear reducers. The technical proposal is as follows: comprises a planet carrier (1), an outer flower ring gear (2), a planet wheel (3) and a sun wheel (6); the planet gears (3) are arranged on the planet carrier (1), the planet gears (3) are arranged outside the sun gear (6) in a surrounding mode and are meshed with the sun gear (6), the planet gears (3) are meshed with the inner ring of the outer flower-shaped inner gear ring (2), and the outer flower-shaped inner gear ring (2) is assembled on the box body (8) through shaft hole matching. The utility model has small overall size and large transmission ratio; the outer ring gear is assembled with the shaft hole of the box body (8) in a matched mode, the interference fit is small, and the outer ring gear is convenient to disassemble and assemble, so that maintenance and use cost is reduced.

Description

Planetary transmission structure convenient to dismouting

Technical Field

The utility model relates to a planetary transmission structure convenient to disassemble and assemble, which is particularly suitable for silage cutting tables and belongs to the technical field of gear reducers.

Background

Most of gear reducers used in existing silage cutting tables adopt single-stage or multi-stage gear reducers, and when a larger transmission ratio is needed, the size of the reducer is increased due to the increase of the size of a transmission gear, so that the overall size of the reducer is increased. And when the planetary gear with small volume, light weight, compact structure and high bearing capacity is adopted for transmission, a larger transmission ratio can be realized under the same volume, the space is better saved, and the manufacturing and using cost is reduced. During its specific manufacturing and use, the ring gear is typically required to be interference fitted at a fixed location within the inner cavity of the case. One of the ring gear installation methods is a method of adopting a temperature difference method, namely, installing the ring gear into a box body and enabling the ring gear and the box body to generate larger interference fit. The novel inner gear ring is characterized by safe and reliable operation, but once the inner gear ring has a damaging failure in use, individual disassembly and replacement of single pieces cannot be realized, so that the whole box body is scrapped, and the waste is serious. The other annular gear installation method is a method for radial positioning by adopting a cylindrical pin with a seam and axial positioning by adopting an axial positioning bolt. Due to the mode of setting the cylindrical pin at the joint, certain deformation is caused between the annular gear and the box body, the transmission precision is reduced, the reaction torque generated in the operation process is difficult to overcome, and the practicability is poor.

Disclosure of Invention

The utility model aims to provide a planetary transmission structure convenient to disassemble and assemble, which solves the defects of large size and small transmission ratio of a gear reducer in the existing silage header and effectively solves the problems that the existing planetary gear transmission is difficult to disassemble and assemble and has difficult consideration of practicality and economy.

The technical scheme of the utility model is as follows:

a planetary transmission structure convenient to disassemble and assemble comprises a planet carrier, an outer flower ring gear, a planet wheel and a sun wheel; the planet gears are arranged on the planet carrier, the planet gears are arranged outside the sun gear in a surrounding mode and are meshed with the sun gear, the planet gears are meshed with the inner ring of the outer flower-shaped inner gear ring, and the outer flower-shaped inner gear ring is assembled on the box body through shaft hole matching.

Further, the outer ring of the outer flower ring gear is provided with an arc convex surface and an arc concave surface which are arranged continuously in a staggered manner, the arc convex surface protrudes outwards, the arc concave surface is recessed inwards, the curvature of the arc convex surface is identical to that of the arc concave surface, the arc convex surface and the arc concave surface which are arranged continuously in a staggered manner integrally form an outer flower ring (the whole is similar to the outer outline of a flower and is fixedly called as an outer flower ring), and the outer flower ring is conjugated with the curve of a corresponding assembly part on the box body.

Further, an outer spline is arranged on a part of the outer ring of the outer spline ring inner gear.

Further, the outer flower circle is provided with a positioning step which is axially arranged.

Further, the planet wheel is arranged on the planet carrier through a needle bearing, and a lower check ring is arranged at the end part of the needle bearing.

Further, the planet carrier is a single-arm planet carrier.

The utility model has the positive effects that: the utility model has small overall size and large transmission ratio; the outer flower ring gear is assembled with the box shaft hole in a matched mode, the interference fit is small, and the outer flower ring gear is convenient to disassemble and assemble, so that maintenance and use cost is reduced.

Drawings

FIG. 1 is a schematic side cross-sectional view of the present utility model;

FIG. 2 is a schematic elevational view of the present utility model;

FIG. 3 is a top view of the mounting structure of the present utility model;

fig. 4 is a side cross-sectional view of the mounting structure of the present utility model.

In the figure: the planet carrier 1, an outer-flower circular inner gear ring 2, a planet wheel 3, a needle bearing 4, a lower check ring 5, a sun wheel 6, a positioning step 7 and a box body 8.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

in this embodiment, with reference to the accompanying drawings, a planetary transmission structure is provided, which is convenient to disassemble and assemble, and comprises a planet carrier 1, an outer ring gear 2, a planet wheel 3, a needle bearing 4, a lower retainer ring 5 and a sun gear 6. The planet gears 3 are supported on the planet carrier 1 in a transmission way, the planet gears 3 are arranged on the outer side of the sun gear 6 in a surrounding way and meshed with the sun gear 6, the planet gears 3 are meshed with the inner ring of the outer flower-shaped annular gear 2, the outer flower-shaped annular gear 2 is correspondingly assembled on the mounting part of the box body 8 through shaft hole matching, and the two are assembled in a conjugate and smooth combination way.

The outer ring of the outer flower ring gear 2 is provided with an arc convex surface and an arc concave surface which are arranged continuously and alternately, the arc convex surface protrudes outwards, the arc concave surface is recessed inwards, the curvature of the arc convex surface is identical with that of the arc concave surface, the arc convex surface and the arc concave surface which are arranged continuously and alternately integrally form an outer flower circle (the whole is similar to the outer outline of a flower and is fixedly called as an outer flower circle), and the outer flower circle is conjugated with the curve of the corresponding assembly part on the box body 8.

The cross section of the outer flower circle is an annular structure formed by continuous convex arc curves and concave arc curves, the circle at the outermost point of all the convex arc curves and the circle at the innermost point of all the concave arc curves are coincident, and the circles are all positioned on the axis of the sun gear.

The outer ring of the outer flower ring gear is divided into two parts, one part is provided with an outer flower ring, the other part is an arc-shaped surface, and the circle where the arc-shaped surface is positioned coincides with the circle where the innermost points of all arc-shaped concave surfaces are positioned.

The outer flower circle is provided with a positioning step 7 which is axially arranged, and the installation part is provided with a positioning groove which is matched with the positioning step to position the utility model.

In this embodiment, the planet carrier 1 is a single-arm planet carrier, and has the characteristics of simple structure and small axial dimension. The single-arm planet carrier is more compact in overall structure, the size and weight of the speed reducer are effectively reduced, and the speed reducer can be quickly disassembled and replaced when the gear is damaged and needs to be replaced, so that the manufacturing cost and the maintenance cost are reduced.

In this embodiment, the number of the planetary gears 3 is four, the four planetary gears 3 are distributed on the outer side of the sun gear 6 in a circumferential array, and the sun gear 6 drives the four planetary gears 3 to rotate synchronously when rotating.

In this embodiment, the needle bearing 4 and the lower retainer ring 5 are mounted on the planet carrier 1, and the radial positioning of the planet wheel 3 is completed by matching the needle bearing 4 with the shaft hole of the planet carrier 1; by adjusting the position of the lower ring 5, the axial free play of the planet wheel 3 is determined.

In this embodiment, the inner ring of outer flower circle ring gear 2 is equipped with the tooth that matches with planet wheel 3, is equipped with arc convex surface and the arc concave surface that the continuous crisscross setting of outer ring of outer flower circle ring gear 2 along circumference 300 circular arc positions, and arc convex surface and arc concave surface correspond assembly position curve conjugation with box 8, make the smooth joint cooperation between the two physique, solved the ring gear and produced stress concentration problem at work, and outer flower circle ring gear 2 transition fit in box 8, the cooperation interference is less, make its easy dismounting, thereby reduce maintenance and use cost.

Claims (6)

1. Planetary transmission structure convenient to dismouting, its characterized in that: comprises a planet carrier (1), an outer flower ring gear (2), a planet wheel (3) and a sun wheel (6); the planet gears (3) are arranged on the planet carrier (1), the planet gears (3) are arranged outside the sun gear (6) in a surrounding mode and are meshed with the sun gear (6), the planet gears (3) are meshed with the inner ring of the outer flower-shaped inner gear ring (2), and the outer flower-shaped inner gear ring (2) is assembled on the box body (8) through shaft hole matching.

2. The planetary transmission structure convenient to disassemble and assemble as claimed in claim 1, wherein: the outer ring of the outer flower circle inner gear ring (2) is provided with an arc convex surface and an arc concave surface which are arranged continuously in a staggered mode, the arc convex surface protrudes outwards, the arc concave surface is recessed inwards, the curvature of the arc convex surface is identical to that of the arc concave surface, the arc convex surface and the arc concave surface which are arranged continuously in the staggered mode integrally form an outer flower circle, and the outer flower circle is conjugated with a corresponding assembly position curve on the box body (8).

3. The planetary transmission structure convenient to disassemble and assemble as claimed in claim 2, wherein: and an outer flower circle is arranged on part of the outer ring of the outer flower circle inner gear ring (2).

4. A planetary transmission structure according to claim 1 or 2, characterized in that: the outer flower circle is provided with a positioning step (7) which is axially arranged.

5. A planetary transmission structure according to claim 1 or 2, characterized in that: the planetary gear (3) is arranged on the planetary carrier (1) through a needle bearing (4), and a lower check ring (5) is arranged at the end part of the needle bearing (4).

6. A planetary transmission structure according to claim 1 or 2, characterized in that: the planet carrier (1) is a single-arm planet carrier.