Bearing for agricultural direction machine

Abstract

The utility model belongs to the bearing field, propose a kind of bearing for agricultural machinery direction machine, including outer ring, inner ring, retainer, roller and sealing cover, the inner wall of inner ring is provided with multiple spiral distribution's ball, the end of inner ring is provided with nested mouth, the end of outer ring back to the assembly inner ring is provided with inner mouth, inner mouth is provided with non-metallic sealing sleeve, non-metallic sealing sleeve is T type structure, the outer end of non-metallic sealing sleeve and the end surface of outer ring are opposite, the inner end of non-metallic sealing sleeve and the mouth bottom of inner mouth are opposite, the side of non-metallic sealing sleeve is provided with the ring convex of with outer ring joint, ring convex is cooperated with the positioning slot of mouth wall being arranged in inner mouth, the inner end of non-metallic sealing sleeve and the mouth bottom of inner mouth are provided with metal sealing ring, metal sealing ring is the T type structure opposite with the shape of non-metallic sealing sleeve. The utility model reasonable in design, sealing is better, it is favorable for reducing the probability of abnormal sound and practicality is stronger, is suitable for large-scale popularization.

Description

Technical Field

[0001] This utility model belongs to the field of bearings, and in particular relates to a bearing for agricultural machinery steering gear. Background Technology

[0002] The agricultural machinery steering gear is the core component of the agricultural machinery steering system. Its function is to amplify and transmit the force exerted by the driver operating the steering wheel, thereby achieving precise control over the direction of travel of the agricultural machinery. The main working principle of the agricultural machinery steering gear is that the driver turns the steering wheel, which drives the gear pair inside the steering gear. Through components such as the steering rocker arm and tie rod, the motion is transmitted to the steering wheels, thus achieving steering of the agricultural machinery.

[0003] Steering gear bearings for agricultural machinery differ from ordinary bearings in that they have a longer inner ring with an end designed to nest with the steering gear. The outer ring of the outer ring is fixed to the steering gear via a nut on the inner wall of the inner ring. In addition to the rollers between the inner and outer rings, the inner wall of the inner ring also contains multiple rings of balls. Besides the sealing function of its own assembly, the steering gear bearing has a telescopic shield between the components at its transmission end. Cracks in the telescopic shield's cross-section increase the probability of dust entering the steering gear bearing. A common problem with steering gear bearings is abnormal noise, often caused by poor sealing. Dust entering the bearing increases friction between the rollers and the shaft, and the accumulation of dust and wear debris eventually leads to abnormal noise. Utility Model Content

[0004] This utility model addresses the technical problems existing in the aforementioned steering gear bearings by proposing a well-designed, well-sealed, and practical agricultural machinery steering gear bearing that helps reduce the probability of abnormal noise.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The bearing for agricultural machinery steering gear provided by this utility model includes an outer ring and an inner ring. A connecting plate is provided on the outer side of the outer ring, and multiple connecting holes are provided on the connecting plate. A cage, rollers, and a sealing cap are provided between the assembly surfaces of the outer ring and the inner ring. Multiple spirally distributed balls are provided on the inner wall of the inner ring. A nesting opening is provided at the end of the inner ring. An inner opening is provided at the end of the outer ring opposite to the assembly of the inner ring. A non-metallic sealing sleeve is provided in the inner opening. The non-metallic sealing sleeve has a T-shaped structure. The outer end of the non-metallic sealing sleeve is opposite to the end face of the outer ring, and the inner end of the non-metallic sealing sleeve is opposite to the bottom of the inner opening. An annular protrusion that engages with the outer ring is provided on the side of the non-metallic sealing sleeve. The annular protrusion cooperates with a positioning groove provided on the wall of the inner opening. A metal sealing ring is provided between the inner end of the non-metallic sealing sleeve and the bottom of the inner opening. The metal sealing ring has a T-shaped structure opposite in shape to the non-metallic sealing sleeve.

[0006] Preferably, the outer end of the non-metallic sealing sleeve is provided with a sealing lip, the inner diameter of which is smaller than the inner diameter of the outer ring.

[0007] Preferably, the inner wall of the sealing lip is provided with a grease reservoir, which is an annular structure with a C-shaped cross-section and the C-shaped notch facing the center of the outer ring.

[0008] Preferably, the outer wall of the outer ring is provided with a plurality of evenly distributed connecting pipe openings, the connecting pipe openings are used to connect to the protective cover, the protective cover is provided with an axial waist-shaped hole that mates with the connecting pipe openings, and a connecting cap is provided on the outside of the connecting pipe openings.

[0009] Preferably, the connecting cap includes a key-shaped cap body, the inside of which is provided with a groove that is nested with the outside of the connecting pipe opening, and a stud that is threadedly connected to the inner wall of the connecting pipe opening is provided at the center of the groove.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] The agricultural machinery steering bearing provided by this utility model, while ensuring the relative rotation and axial movement of the outer ring and shaft, improves the sealing performance between the inner side of the outer ring and the shaft by using a non-metallic sealing sleeve and a metal sealing ring, which helps reduce the probability of dust entering the bearing. This utility model has a reasonable design, good sealing performance, helps reduce the probability of abnormal noise, and is highly practical, making it suitable for large-scale promotion. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A perspective view of a bearing for a steering mechanism of agricultural machinery provided in an embodiment;

[0014] Figure 2 A front view of the bearing and guard for the steering gear of agricultural machinery provided in the embodiment;

[0015] Figure 3 for Figure 2 A cross-sectional view of the bearing and guard for the steering gear of China National Agricultural Machinery Co., Ltd. in the FF direction;

[0016] Figure 4 for Figure 3 Enlarged schematic diagram of the bearing and guard for the steering gear of China National Agricultural Machinery at point A;

[0017] Figure 5 A perspective view of the bearing and guard for the steering gear of agricultural machinery provided in the embodiment;

[0018] In the above figures: 1. Outer ring; 1a. Connecting plate; 1b. Connecting hole; 1c. Inner opening; 1d. Positioning groove; 2. Inner ring; 2a. Nesting opening; 3. Cage; 4. Roller; 5. Sealing cap; 6. Ball; 7. Non-metallic sealing sleeve; 7a. Ring protrusion; 7b. Sealing lip; 7c. Grease reservoir; 8. Metal sealing ring; 9. Connecting pipe port; 10. Protective cover; 10a. Axial oblong hole; 11. Connecting cap; 11a. Cap body; 11b. Insert groove; 11c. Stud. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Examples, such as Figures 1-5 As shown, the bearing for agricultural machinery steering gear provided by this utility model includes an outer ring 1 and an inner ring 2. A connecting plate 1a is provided on the outer side of the outer ring 1, and multiple connecting holes 1b are provided on the connecting plate 1a. A cage 3, rollers 4, and a sealing cover 5 are provided between the assembly surfaces of the outer ring 1 and the inner ring 2. Multiple spirally distributed balls are provided on the inner wall of the inner ring 2. The inner ring 2 and the outer ring 1 can rotate relative to each other through the tapered rollers 4, and the inner ring 2 can translate relative to the output shaft of the steering gear through the balls. Based on this, the inner ring 2 provided by this utility model has a nesting opening 2a at its end, and an inner opening 1c is provided at the end of the outer ring 1 facing away from the inner ring 2. A non-metallic sealing sleeve 7 is provided in the inner opening 1c. The non-metallic sealing sleeve 7 has a T-shaped structure. The outer end of the non-metallic sealing sleeve 7 is opposite to the end face of the outer ring 1, and the inner end of the non-metallic sealing sleeve 7 is opposite to the bottom of the opening of the inner opening 1c. The side of the non-metallic sealing sleeve 7 is provided with an annular protrusion 7a that engages with the outer ring 1. The annular protrusion 7a cooperates with the positioning groove 1d provided on the opening wall of the inner opening 1c. A metal sealing ring 8 is provided between the inner end of the non-metallic sealing sleeve 7 and the bottom of the opening of the inner opening 1c. The metal sealing ring 8 has a T-shaped structure with the opposite shape to the non-metallic sealing sleeve 7.

[0022] Specifically, the non-metallic sealing sleeve 7 is positioned and nested on the outer ring 1 via the annular protrusion 7a and the positioning groove 1d. The non-metallic sealing sleeve 7 is made of wear-resistant material such as polyurethane and nitrile rubber, and its inner diameter is slightly smaller than that of the outer ring 1. The metal sealing ring 8 can be made of low-carbon steel and serves to adjust the fit clearance between the non-metallic sealing sleeve 7 and the inner opening 1c, providing a certain support capacity for the non-metallic sealing sleeve 7. Furthermore, the metal sealing ring 8 mates with the bottom ring opening located at the bottom of the non-metallic sealing sleeve 7, preventing the bottom of the non-metallic sealing ring 8 from curling or deforming. In this way, while ensuring the relative rotation and axial movement of the outer ring 1 and the shaft, the use of the non-metallic sealing sleeve 7 and the metal sealing ring 8 can improve the sealing performance between the inner side of the outer ring 1 and the shaft, which helps to reduce the probability of dust entering the bearing of the agricultural machinery steering gear and reduces the probability of abnormal noise.

[0023] Furthermore, the outer end of the non-metallic sealing sleeve 7 provided by this utility model is provided with a sealing lip 7b. The inner diameter of the sealing lip 7b is smaller than the inner diameter of the outer ring 1. By providing the sealing lip 7b, the contact pressure between the sealing lip and the steering gear output shaft is increased on the one hand, and a certain wear resistance allowance is provided on the other hand, thereby effectively improving the actual sealing performance and utilization rate of the non-metallic sealing sleeve 7.

[0024] To improve the fit between the sealing lip 7b and the steering gear output shaft, the inner wall of the sealing lip 7b provided by this invention is provided with a grease reservoir 7c. The grease reservoir 7c has an annular structure, and its cross-sectional shape is C-shaped, with the C-shaped notch facing the center of the outer ring 1. In this way, the grease reservoir 7c improves the sealing fit between itself and the steering gear output shaft by storing grease, and utilizes the lubrication of the grease to ensure the real-time working performance of the steering gear output shaft, avoiding large-area corrosion defects between the non-metallic sealing sleeve 7 and the steering gear output shaft.

[0025] Considering the connection characteristics between the bearing and the steering gear cover 10, the outer wall of the outer ring 1 provided by this utility model is provided with multiple evenly distributed connecting pipe ports 9. The connecting pipe ports 9 are used to connect the cover 10. The cover 10 is provided with an axial oblong hole 10a that mates with the connecting pipe ports 9. A connecting cap 11 is provided on the outer side of the connecting pipe ports 9. In this way, the cover 10 has a certain axial margin through the connecting pipe ports 9 and the axial oblong hole 10a. Based on the adjustment action of the steering gear, the cover 10 can compensate according to the external force it is subjected to in real time, avoiding frequent long-distance expansion and contraction of the cover 10. To a certain extent, this can extend the actual service life of the bearing and reduce the probability of dust entering the steering gear bearing.

[0026] like Figure 4As shown, this utility model utilizes the connecting cap 11 and the connecting pipe port 9 to limit one end of the protective cover 10, and uses the connecting cap 11 to cover the exposed surface of the axial waist-shaped hole 10a. For example, the connecting cap 11 includes a key-shaped cap body 11a, and the inside of the cap body 11a is provided with a groove 11b that is nested with the outside of the connecting pipe port 9. The center of the groove 11b is provided with a stud 11c that is threaded to the inner wall of the connecting pipe port 9. Thus, while ensuring the connection reliability between the connecting pipe port 9 and the connecting cap 11, the sealing performance of the protective cover 10 and the outer ring 1 at multiple connection nodes can be further improved.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A bearing for an agricultural machinery steering mechanism, comprising an outer ring and an inner ring, wherein a connecting plate is provided on the outer side of the outer ring, the connecting plate is provided with multiple connecting holes, a cage, rollers and a sealing cap are provided between the mating surfaces of the outer ring and the inner ring, a plurality of spirally distributed balls are provided on the inner wall of the inner ring, and a nesting opening is provided at the end of the inner ring, characterized in that, The outer ring has an inner opening at one end facing away from the inner ring. A non-metallic sealing sleeve is provided in the inner opening. The non-metallic sealing sleeve has a T-shaped structure. The outer end of the non-metallic sealing sleeve is opposite to the end face of the outer ring, and the inner end of the non-metallic sealing sleeve is opposite to the bottom of the inner opening. The side of the non-metallic sealing sleeve has an annular protrusion that engages with the outer ring. The annular protrusion cooperates with a positioning groove provided on the wall of the inner opening. A metal sealing ring is provided between the inner end of the non-metallic sealing sleeve and the bottom of the inner opening. The metal sealing ring has a T-shaped structure with the opposite shape to the non-metallic sealing sleeve.

2. The bearing for agricultural machinery steering gear according to claim 1, characterized in that, The outer end of the non-metallic sealing sleeve is provided with a sealing lip, the inner diameter of which is smaller than the inner diameter of the outer ring.

3. The bearing for agricultural machinery steering gear according to claim 2, characterized in that, The inner wall of the sealing lip is provided with a grease reservoir. The grease reservoir has an annular structure and a C-shaped cross-section with the C-shaped notch facing the center of the outer ring.

4. The bearing for agricultural machinery steering gear according to any one of claims 1-3, characterized in that, The outer ring has a plurality of evenly distributed connecting pipe openings on its outer wall. The connecting pipe openings are used to connect to the protective cover. The protective cover has an axial waist-shaped hole that mates with the connecting pipe openings. A connecting cap is provided on the outside of the connecting pipe openings.

5. The bearing for agricultural machinery steering gear according to claim 4, characterized in that, The connecting cap includes a key-shaped cap body, the inside of which is provided with a groove that is nested with the outside of the connecting pipe opening, and a stud that is threadedly connected to the inner wall of the connecting pipe opening is provided at the center of the groove.

Images