CN112628200A

CN112628200A - Harvester fan structure

Info

Publication number: CN112628200A
Application number: CN202011616061.2A
Authority: CN
Inventors: 王军; 邢立成; 王佳军
Original assignee: Jiangsu World Agricultural Machinery Co Ltd
Current assignee: Jiangsu World Agricultural Machinery Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-09
Also published as: WO2022141991A1

Abstract

The invention provides a harvester fan structure which comprises a fan shaft, a plurality of supporting units and a plurality of fan blades, wherein the supporting units are uniformly fixed on the fan shaft at intervals, the fan blades are fixed on the supporting units, each supporting unit comprises a plurality of fan blade supports, the supporting units are sequentially bolted and fixed and locked on the fan shaft along the circumferential direction of the fan shaft, and the fan blades are respectively bolted and fixed on the fan blade supports. All the fan blade supports enclose a polygon which is circumscribed to a circle of the cross section of the fan shaft. Through the mode of bolt joint with a plurality of flabellum supports around the fan axle fixed, simple structure is stable, and convenient and fast, the easy change is dismantled to spare part.

Description

Harvester fan structure

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a harvester fan structure.

Background

The crawler-type combine harvester threshing system can be divided into a longitudinal axial flow type threshing and cleaning system and a transverse axial flow type threshing and cleaning system, and the threshing and cleaning systems in the two forms are the main structural forms used in the current market.

The harvester is mainly internally divided into a threshing system, a screening system and a winnowing system from top to bottom, the winnowing system is used for continuously blowing air towards the tail of the harvester, the air blows the air to pass through a falling area of crop grains and a mesh screen surface in the screening system, and impurities such as grass fragments and fluff which are lighter than the crop grains are blown out to an opening at the tail of the harvester, so that the crop grains with high cleanliness can be collected.

Among present air classification system, each flabellum in the fan all fixes on the fan shaft through the welded mode, receives manual welding technology's influence, leads to the desoldering even to leak easily, causes the fan structure unstable, has the potential safety hazard under the high-speed rotation, and when the flabellum appears the damage, the process of changing the flabellum is complicated, with high costs, causes the wasting of resources.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects of poor fan blade firmness, complicated replacement process and high cost in the prior art.

Therefore, the invention provides a harvester fan structure, comprising:

the two ends of the fan shaft are respectively fixed on two bearings positioned on the rack;

the supporting units are fixed on the fan shaft at uniform intervals;

a plurality of fan blades fixed on the supporting unit;

any of the support units includes:

the fan blade supports are sequentially bolted, fixed and locked on the fan shaft along the circumferential direction of the fan shaft; the fan blades are respectively bolted and fixed on the fan blade brackets; all the fan blade supports enclose a polygon, and the polygon is circumscribed with a circle of the cross section of the fan shaft.

All the fan blade supports in any one of the supporting units enclose a regular polygon.

The fan blade support is of a plate-shaped structure.

The fan blade support is bent to form a fixing section and an installation section; the end part of the mounting section is suitable for mounting the fan blade; an included angle alpha formed between the fixed section and the mounting section is complementary with an internal angle beta of a regular polygon formed by the fan blade support.

The fixed section of one fan blade bracket is bolted and fixed on the mounting section of the other fan blade bracket.

A flat-mouth groove is formed in the fan shaft corresponding to any one of the supporting units; one fan blade support is fixed in the flat-mouth groove.

The reinforcing plate is welded and fixed in the flat-mouth groove; the fan blade bracket is fixed on the upper surface of the reinforcing plate; the thickness of the reinforcing plate is the same as the depth of the flat-mouth groove; the width of the reinforcing plate in the radial direction of the fan shaft is not larger than the diameter of the fan shaft.

The width of the reinforcing plate is the same as the width dimension of the flat slot in the radial direction of the fan shaft.

The fan shaft is provided with a plurality of flat-mouth grooves; the flat-mouth grooves and the fan blade supports are arranged in a one-to-one correspondence manner; the fan blade support is correspondingly fixed in the flat-mouth groove.

The fan blades are fixed on two fan blade brackets in two adjacent supporting units in a bridging manner.

The technical scheme of the invention has the following advantages:

1. the invention provides a harvester fan structure which comprises a fan shaft, a plurality of supporting units and a plurality of fan blades, wherein the supporting units are uniformly fixed on the fan shaft at intervals, the fan blades are fixed on the supporting units, each supporting unit comprises a plurality of fan blade supports, the supporting units are sequentially bolted and fixed on the fan shaft along the circumferential direction of the fan shaft and locked on the fan shaft, and the fan blades are respectively bolted and fixed on the fan blade supports. All the fan blade supports enclose a polygon which is circumscribed to a circle of the cross section of the fan shaft. Through the mode of bolt joint with a plurality of flabellum supports around the fan axle fixed, simple structure is stable, and convenient and fast, the easy change is dismantled to spare part.

2. According to the harvester fan structure provided by the invention, the flat-opening groove is formed in the fan shaft, the fan blade support is fixed in the flat-opening groove, and the relative sliding between the fan blade support and the fan shaft caused by small clamping force of the fan blade support fixed on the fan shaft is further avoided through the limiting of the flat-opening groove.

Drawings

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

FIG. 1 is a cross-sectional view of a fan structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a fan shaft according to an embodiment of the present invention;

fig. 3 is a perspective view of a fan structure according to an embodiment of the invention.

Description of reference numerals:

1i, a fan shaft; 11i, a plain groove; 2i, fan blades; 3i, a fan blade bracket; 31i, a mounting section; 32i, a fixed section; 4i, reinforcing plates.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The embodiment provides a harvester fan structure, as shown in fig. 3, including fan axle 1i, a plurality of supporting unit and a plurality of flabellum 2i, the supporting unit is evenly fixed on fan axle 1i at an interval, and flabellum 2i fixes on the supporting unit, as shown in fig. 1, every supporting unit includes a plurality of flabellum supports 3i, along fan axle 1 i's circumference order bolt fixed and locking on fan axle 1i, flabellum 2i bolts respectively and fixes on flabellum support 3 i.

In this embodiment, the fan blade supports 3i are plate-shaped structures, the fan blade supports 3i are bent to form a fixing section 32i and an installation section 31i, in the same supporting unit, the fixing section 32i of one fan blade support 3i is bolted and fixed on the installation section 31i of the other fan blade support 3i, the plurality of fan blade supports 3i are sequentially connected end to end, a polygon is defined by the circumference of the fan shaft 1i, and the polygon is circumscribed with a circle of the cross section of the fan shaft 1 i. Through the mode of bolt with a plurality of flabellum supports 3i fixed around fan axle 1i, simple structure is stable, and convenient and fast, the easy change is dismantled to spare part.

All fan blade supports 3i in any supporting unit enclose a regular polygon, and an included angle alpha formed between the fixing section 32i and the mounting section 31i is complementary with an inner angle beta of the regular polygon. As shown in fig. 1 or fig. 3, in this embodiment, four blade supports 3i are disposed in any one of the support units, and the fixing section 32i and the mounting section 31i in each blade support 3i are disposed at a right angle and jointly enclose a square shape circumscribing a cross-sectional circle of the fan shaft 1 i.

In this embodiment, as shown in fig. 2, a flat slot 11i is formed in a fan shaft 1i corresponding to any supporting unit, a reinforcing plate 4i is welded in the flat slot 11i, the thickness of the reinforcing plate 4i is the same as the depth of the flat slot 11i, that is, the upper surface of the reinforcing plate 4i is tangent to a circle of the cross section of the fan shaft 1i, and meanwhile, the radial width of the reinforcing plate 4i along the fan shaft 1i is not greater than the diameter of the fan shaft 1i, that is, the side length of a square surrounded by a fan blade support 3i is avoided being greater than, which results in that the assembly cannot be performed. In the present embodiment, the width of the reinforcing plate 4i is the same as the width of the flat groove 11 i. Through the limit of the flat slot 11i, the relative sliding between the fan blade support 3i and the fan shaft 1i caused by the small clamping force of the fan blade support 3i fixed on the fan shaft 1i is further avoided.

As shown in fig. 3, in this embodiment, four supporting units are sequentially disposed on the fan shaft 1i at intervals, four blades 2i are disposed on two supporting units located on the left side, the blades 2i are of a sheet structure, and each blade 2i spans over two supporting units and is bolted and fixed to the mounting sections 31i of the two blade brackets 3 i. The fan blades 2i on the two support units on the right side are arranged the same as on the left side, and the detailed structure is not described herein. Left and right sides flabellum 2i forms two sets of fan structures that are parallel, can provide more inlet air channel between two sets of fan structures for fan air supply area is big and the air supply is even.

As a first alternative embodiment of embodiment 1, a plurality of flat slots 11i may be formed in the fan shaft 1i, the flat slots 11i and the blade supports 3i are arranged in a one-to-one correspondence, and the blade supports 3i are directly and correspondingly embedded in the flat slots 11i, and are sequentially bolted end to be locked on the fan shaft 1 i.

As a second alternative embodiment of the embodiment 1, when a flat slot 11i is formed on a supporting unit corresponding to the fan shaft 1i, the reinforcing plate 4i is welded and fixed on one of the blade supports 3i in the supporting unit, and the reinforcing plate 4i is embedded in the flat slot 11i, so as to limit the blade support 3i in the axial direction of the fan shaft 1 i. The rest fan blade supports 3i in the supporting unit and the fan blade supports 3i of the welding reinforcing plate 4i are arranged on the fan shaft 1i in a surrounding mode and limited.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A harvester fan structure, comprising:

the fan shaft (1i), its both ends are fixed on two bearings located on framework separately;

a plurality of supporting units which are fixed on the fan shaft (1i) at uniform intervals;

a plurality of fan blades (2i) fixed to the support unit;

any of the support units includes:

a plurality of fan blade supports (3i) bolted and fixed to the fan shaft (1i) in this order in the circumferential direction of the fan shaft (1i) and locked to the fan shaft (1 i); the fan blades (2i) are respectively bolted and fixed on the fan blade bracket (3 i); all the fan blade supports (3i) enclose a polygon which is circumscribed to a circle of the cross section of the fan shaft (1 i).

2. Harvester fan structure according to claim 1, characterized in that all the fan blade supports (3i) in any one of the support units enclose a regular polygon.

3. Harvester fan structure according to claim 2, characterized in that the blade support (3i) is a plate-like structure.

4. Harvester fan structure according to claim 3, characterized in that the blade support (3i) is bent to form a fixing section (32i) and a mounting section (31 i); the end of the mounting section (31i) is suitable for mounting the fan blade; an included angle alpha formed between the fixing section (32i) and the mounting section (31i) is complementary with an internal angle beta of a regular polygon formed by the fan blade supports (3 i).

5. Harvester fan structure according to claim 4, characterized in that the fixed section (32i) of one of the blade supports (3i) is bolted to the mounting section (31i) of the other blade support (3 i).

6. The harvester fan structure according to any one of claims 1 to 5, wherein the fan shaft (1i) corresponding to any one of the support units is provided with a flat slot (11 i); one fan blade support (3i) is fixed in the flat groove (11 i).

7. Harvester fan structure according to claim 6, further comprising a stiffening plate (4i) welded fixed within the flat slot (11 i); the fan blade support (3i) is fixed on the upper surface of the reinforcing plate (4 i); the thickness of the reinforcing plate (4i) is the same as the groove depth of the flat groove (11 i); the width of the reinforcing plate (4i) in the radial direction of the fan shaft (1i) is not greater than the diameter of the fan shaft (1 i).

8. Harvester fan structure according to claim 7, characterised in that the width of the stiffening plate (4i) is the same size as the width of the flat slot (11i) in the radial direction of the fan shaft (1 i).

9. Harvester fan structure according to any one of claims 1-5, characterized in that the fan shaft (1i) is provided with a plurality of flat slots (11 i); the flat-mouth grooves (11i) and the fan blade supports (3i) are arranged in a one-to-one correspondence manner; the fan blade support (3i) is correspondingly fixed in the flat-mouth groove (11 i).

10. Harvester fan structure according to any one of claims 1-5, characterized in that the fan blades (2i) are fixed across two of the fan blade supports (3i) in two adjacent support units.