CN107420418A - A kind of bearing arrangement for agricultural machinery - Google Patents

Abstract

The invention discloses a bearing structure for agricultural machinery and belongs to the technical field of bearing structures. It consists of an outer ring and an inner ring that rotate relatively. The inner ring is set in the outer ring and coaxially arranged; the inner side of the outer ring is provided with three consecutive ring-shaped inner chutes arranged side by side along its circumference, and the outer chute in the middle and the outer chute on both sides The radial direction of the chute is opposite; the outer side of the inner ring is provided with three consecutive ring-shaped outer chutes arranged side by side along its circumference. The outer chute corresponds to the inner chute one by one and the radial direction is opposite. There is a sliding body between the outer chute and the sliding body; the sliding body includes a plurality of sliding blocks with an arc-shaped structure, and the sliding block is provided with an upper curved surface corresponding to the outer chute and a lower curved surface corresponding to the inner chute The curvature of the upper surface is the same as that of the outer chute, and the upper surface and the inner chute are surface-fitting. The invention has the advantages of low processing cost, simple structure and large radial bearing capacity, and can meet the popularization and application of agricultural machinery.

Description

A bearing structure for agricultural machinery

technical field

The invention relates to the technical field of bearing structures, in particular to a bearing structure for agricultural machinery.

Background technique

Bearings are mainly used to support the shaft and the parts on the shaft, maintain the rotation accuracy of the shaft and reduce the friction and wear between the shaft and the support, and are widely used in various machinery. In the prior art, sliding bearings can meet the conditions of heavy loads and large load changes, but sliding bearings cannot provide better axial support; although rolling bearings have small frictional resistance, sensitive starting, high efficiency, simple lubrication and easy replacement And other advantages, but its disadvantages are also obvious. Its impact resistance is poor, and it is not suitable for low-speed, heavy-load, and large-change load parts of agricultural machinery. Therefore, there is a need for a bearing that meets the needs of heavy loads, low speeds and large load changes during use of agricultural machinery.

Contents of the invention

The purpose of the present invention is to solve the above problems and provide a bearing structure for agricultural machinery. The bearing system adopts rolling elements with full contact surfaces, which can meet the needs of rotating parts with low speed, heavy load and large load changes during the process. .

In order to achieve the above object, the technical scheme adopted in the present invention is:

A bearing structure for agricultural machinery, comprising an outer ring and an inner ring that rotate relatively, the inner ring is sleeved in the outer ring and arranged coaxially, and a cage is also provided between the outer ring and the inner ring; it is characterized in that: The inner side of the outer ring is provided with three consecutive ring-shaped inner chutes arranged side by side along its circumferential direction, and the radial direction of the outer chute located in the middle is opposite to that of the outer chutes located on both sides; The ring-shaped outer chute, the outer chute corresponds to the inner chute one by one and the radial direction is opposite, and a sliding body is arranged between the corresponding inner chute and the outer chute; the sliding body includes multiple One is a sliding block with an arc-shaped structure, and the sliding block is provided with an upper curved surface corresponding to the outer chute and a lower curved surface corresponding to the inner chute; the curvature of the upper curved surface is consistent with the outer chute The curvature of the upper surface is the same as that of the inner chute; the curvature of the lower surface is the same as that of the inner chute and the lower surface is surface-fitted with the outer chute; the circumferential direction of the sliding block The end surface is coplanar with the axis of the inner ring; the circumferential end surface of the sliding block forms a circular arc transition with its upper curved surface and lower curved surface.

Preferably, the inner chute located on both sides of the outer ring is a concave slideway structure, the inner chute located in the middle of the outer ring is a convex slideway structure, and the curvature radius of the three inner chute arranged side by side is the same .

Preferably, a dust-proof cover is provided between the outer ring and the inner ring, and the dust-proof cover is correspondingly covered on both sides of the bearing in the axial direction, and is slidably sealed with the inner side of the outer ring and the outer side of the inner ring.

Preferably, the contact area between the sliding block and the outer chute is larger than the contact area between the sliding block and the inner chute.

Preferably, there are at least four sliding blocks.

Preferably, the outer chute and the inner chute have the same curvature radius.

Preferably, the outer ring is provided with an inner oil groove along the circumference of the inner chute, and the inner oil groove is located in the middle of the inner chute; the inner ring is provided with an outer oil groove along the circumference of the outer chute, and the outer oil groove is located in the middle of the outer chute .

Owing to adopting above-mentioned technical scheme, the present invention has following beneficial effect:

1. In the present invention, a slidable sliding body is provided to replace the rolling body in the prior art. The bearing obtained by adopting it has a large bearing capacity, is suitable for low-speed operation, and can meet working conditions with large changes in bearing capacity. Most of the existing bearing rolling elements are spherical or cylindrical, and the contact with the inner and outer rings is mostly point contact and line contact. Although the rolling effect is good, it cannot provide high axial bearing capacity in agricultural machinery and other industries. , the thrust bearing obtained by the sliding body used in the present invention, the contact provided by the rolling body and the inner and outer rings is surface contact, which effectively improves the axial bearing capacity; the contact between the rolling body and the upper and lower rings is the main force-bearing place, point contact Line contact bearing capacity is not as good as surface contact.

2. Existing bearings require high processing precision, such as angular contact ball bearings, while the present invention requires relatively low processing precision, and the number of sliding bodies used at the same time is required to be less, and at least 4 sliding bodies can meet the work needs. Due to the large bearing capacity of the surface contact, although the relative friction is larger than that of the point contact and the line contact, for agriculture and heavy-duty equipment running at low speeds, the bearing friction of the present invention is significantly lower than that of the prior art under lubricated conditions. There is not much difference, which can meet the job requirements. During operation, the sliding body can remain relatively stationary or relatively rotate, which has the advantages of sliding bearings and also has the advantages of bearings.

3. The invention has the advantages of low processing cost, simple structure and large radial bearing capacity. By using surface contact sliding, it solves the shortcomings of rolling bearings in the prior art, and can meet the popularization and application of agricultural machinery.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a sectional view of FIG. 1 .

Fig. 3 is a schematic diagram of the cross-sectional structure of the sliding block of the present invention.

In the accompanying drawings, 1-outer ring, 2-inner ring, 3-cage 3, 4-sliding block 4, 5-upper curved surface, 6-lower curved surface.

detailed description

The invention discloses a bearing structure for agricultural machinery, comprising an outer ring and an inner ring that rotate relatively, the inner ring is sleeved in the outer ring and arranged coaxially, and a cage 3 is also arranged between the outer ring and the inner ring; The inner side of the outer ring is provided with three consecutive ring-shaped inner chutes arranged side by side along its circumferential direction, and the radial direction of the outer chute located in the middle is opposite to that of the outer chutes located on both sides; The ring-shaped outer chute is provided, the outer chute corresponds to the inner chute one by one and the radial direction is opposite, and a sliding body is arranged between the corresponding inner chute and the outer chute; the sliding body includes A plurality of sliding blocks 4 of arc-shaped structure, the sliding block 4 is provided with an upper curved surface corresponding to the outer chute and a lower curved surface corresponding to the inner chute; the curvature of the upper curved surface is consistent with the The curvature of the outer chute is the same and the upper curved surface is surface-fitted with the inner chute; the curvature of the lower curved surface is the same as that of the inner chute and the lower curved surface is surface-fitted with the outer chute; the sliding block The circumferential end surface of 4 is coplanar with the axis of the inner ring; the circumferential end surface of the sliding block 4 forms a circular arc transition with its upper curved surface and lower curved surface.

The specific implementation of the invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1-3, a bearing structure for agricultural machinery includes an outer ring 1 and an inner ring 2 that rotate relatively. The inner ring 2 is sleeved in the outer ring 1 and arranged coaxially. A cage 3 is also provided between them. The inner side of the outer ring 1 is provided with three consecutive ring-shaped inner chutes arranged side by side along its circumference. The outer chute in the middle is opposite to the radial direction of the outer chutes on both sides; specifically, the outer chute is concave at both ends. A continuous wavy structure with a raised middle; here the three outer chutes form a complete outer chute. The outer side of the inner ring 2 is provided with continuously juxtaposed annular outer chutes along its circumference. The outer chute corresponds to the inner chute one by one and the radial direction is opposite, that is, the inner chute is also concave at both ends and raised in the middle. The continuous wavy structure; here the three inner chutes form a complete inner chute. It should be noted here that the outside or inside of the outer ring 11 and inner ring 22 mentioned in the embodiment refers to the radial arc surface, not the two axial end surfaces. A sliding body is arranged between the corresponding inner and outer slideways. The sliding body includes 6 sliding blocks 4 of arc-shaped structure, and the sliding block 4 is provided with an upper curved surface 5 corresponding to the outer slideway and a lower curved surface 6 corresponding to the inner slideway; The curvature is the same as that of the outer chute and the upper curved surface 5 and the inner chute are surface-bonded. The curvature of the lower curved surface 6 is the same as that of the inner chute, and the lower curved surface 6 and the outer chute are surface-fitted; the circumferential end surface of the sliding block 4 is coplanar with the axis of the inner ring 2; the circumferential end surface of the sliding block 4 is uniform It forms a circular arc transition with its upper curved surface 5 and lower curved surface 6 .

The inner chute located on both sides of the outer ring 1 is a concave slideway structure, the inner chute located in the middle of the outer ring 1 is a convex slideway structure, and the three inner chute arranged side by side have the same curvature radius.

Here, a dust cover is provided between the outer ring 1 and the inner ring 2 , and the dust cover is correspondingly covered on both sides of the bearing axial direction, and slides and seals with the inner side of the outer ring 1 and the outer side of the inner ring 2 .

The contact area of the sliding block 4 and the outer slideway is larger than the contact area of the sliding block 4 and the inner slideway. Here, multi-structure surface contact is adopted, and the sliding contact area is larger than that of the existing sliding bearing of the same specification. At the same time, the sliding block 4 is not always in a static state, and it can slide along the slideway, which has the effect that the sliding bearing does not have, that is, it has a good sliding performance.

In order to increase the lubricating effect, an inner oil groove is provided on the ring along the circumference of the inner chute, and the inner oil groove is located in the middle of the inner chute; the inner ring 2 is provided with an outer oil groove along the circumference of the outer chute, and the outer oil groove is located in the middle of the outer chute.

The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not used to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention shall belong to The scope of patents covered by the present invention.

Claims (7)

1. A bearing structure for agricultural machinery, comprising an outer ring and an inner ring that rotate relatively, the inner ring is sleeved in the outer ring and arranged coaxially, and a cage is also provided between the outer ring and the inner ring; it is characterized in that: The inner side of the outer ring is provided with three consecutive ring-shaped inner chutes arranged side by side along its circumferential direction, and the outer chute in the middle is opposite to the radial direction of the outer chutes located on both sides; the outer side of the inner ring is provided with three continuous rings along its circumferential direction The annular outer chute arranged side by side, the outer chute corresponds to the inner chute one by one and the radial direction is opposite, and a sliding body is arranged between the corresponding inner chute and the outer chute; the sliding body It includes a plurality of sliding blocks with an arc-shaped structure, and the sliding block is provided with an upper curved surface corresponding to the outer chute and a lower curved surface corresponding to the inner chute; the curvature of the upper curved surface is consistent with the outer surface. The curvature of the chute is the same and the upper curved surface is surface-fitted with the inner chute; the curvature of the lower curved surface is the same as that of the inner chute and the lower curved surface is surface-fitted with the outer chute; the sliding block The circumferential end surface is coplanar with the axis of the inner ring; the circumferential end surface of the sliding block forms a circular arc transition with its upper curved surface and lower curved surface. 2. A bearing structure for agricultural machinery according to claim 1, characterized in that: the inner chute located on both sides of the outer ring is a concave slideway structure, and the inner chute located in the middle of the outer ring The chute is a convex slideway structure, and the three inner chutes arranged side by side have the same curvature radius. 3. A bearing structure for agricultural machinery according to claim 1, characterized in that: a dust cover is provided between the outer ring and the inner ring, and the dust cover is correspondingly fitted on the bearing shaft to both sides, and slide seals against the inner side of the outer ring and the outer side of the inner ring. 4. The bearing structure for agricultural machinery according to claim 1, wherein the contact area between the sliding block and the outer chute is larger than the contact area between the sliding block and the inner chute. 5. The bearing structure for agricultural machinery according to claim 1, wherein there are at least four sliding blocks. 6 . The bearing structure for agricultural machinery according to claim 1 , wherein the outer chute and the inner chute have the same curvature radius. 7. A bearing structure for agricultural machinery according to claim 1, characterized in that: the outer ring is provided with an inner oil groove along the circumference of the inner chute, and the inner oil groove is located in the middle of the inner chute; An outer oil groove is arranged on the ring along the circumference of the outer chute, and the outer oil groove is located in the middle of the outer chute.