Rotary cultivator rotating shaft self-cleaning connecting structure

Abstract

The utility model relates to a rotary cultivator rotating shaft self-cleaning connecting structure, and belongs to the technical field of farming machinery. The oil inlet is formed in the end cover, connected with the bearing, of the rotary cultivator rotating shaft, oil liquid is fed into the bearing, the oil liquid can carry soil and dust in the bearing to be discharged along a gap in the connecting position of the rotating shaft and the weed prevention ring in the flowing process, the self-cleaning function of the bearing is achieved, and the service life of the bearing is prolonged. The problems that the lubricating effect of the bearing is reduced and abrasion is aggravated are effectively solved, the maintenance cost of the bearing is further reduced, the working reliability of the rotary cultivator is guaranteed, a user only needs to regularly supplement or replace lubricating oil, complex maintenance operation is not needed, and time and labor are saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery, and in particular relates to a self-cleaning connection structure of a rotary tiller shaft. Background Art

[0002] With the advancement of agricultural modernization in my country, rotary tillers, as important agricultural farming machinery, are widely used in land plowing, soil crushing and weeding operations.

[0003] During the operation of the rotary tiller, the connection between the shaft and the bearing is often exposed to soil and dust. Fine soil and dust can easily enter the bearing through the gap between the shaft and the seal, resulting in a decrease in the lubrication effect of the bearing. The long-term accumulation of soil and dust will aggravate the wear inside the bearing and even cause failure, thus affecting the normal operation of the rotary tiller. At the same time, due to the limited space inside the bearing, the soil is difficult to be discharged through conventional cleaning methods. At present, the maintenance and cleaning of the bearing mainly relies on manual operation, which requires regular shutdown and manual cleaning of the soil and debris inside the bearing, which is time-consuming, labor-intensive and inefficient. Utility Model Content

[0004] In order to overcome the problem in the background technology that fine soil and dust can easily enter the bearing through the gap between the rotating shaft and the seal, resulting in a decrease in the lubrication effect of the bearing, the long-term accumulation of soil and dust will aggravate the wear inside the bearing and even cause failure, affecting the normal operation of the rotary tiller. At the same time, the maintenance and cleaning of the bearing mainly rely on manual operation, which requires regular shutdown and manual cleaning of the soil and debris inside the bearing, which is time-consuming, labor-intensive and inefficient. The utility model provides a self-cleaning connection structure for the rotary tiller shaft; by arranging an oil inlet on the end cover where the rotary tiller shaft and the bearing are connected, oil is sent into the bearing, and the oil can carry the soil and dust inside the bearing and be discharged along the gap at the connection between the rotating shaft and the grass ring during the flow process, thereby realizing the self-cleaning function of the bearing, effectively solving the problems of decreased bearing lubrication effect and aggravated wear, further reducing the maintenance cost of the bearing, and ensuring the reliability of the rotary tiller. The user only needs to replenish or replace the lubricating oil regularly, without the need for complicated maintenance operations, saving time and effort.

[0005] To achieve the above-mentioned purpose, the utility model is realized through the following technical solutions: a self-cleaning connecting structure of a rotary tiller shaft mainly comprises a shaft, a bearing seat, a bearing, an end cover, a double-ring oil seal, a mud and water oil seal, an annular protrusion, and a weed prevention ring. An annular protrusion is provided inside the bearing seat, and the interior of the bearing seat is sequentially divided into a first cylindrical mounting groove, a second mounting groove and a third cylindrical mounting groove by the annular protrusion. The diameters of the first mounting groove and the third mounting groove are both larger than the diameter of the second mounting groove. Two groups of inclined circular hole-shaped oil channels are symmetrically provided at the end of the annular protrusion. The oil inlet of the oil channel is connected to the first mounting groove, and the oil outlet is connected to the third mounting groove, and the oil inlet of the two groups of oil channels is connected to the oil outlet. The spacing is greater than the spacing of the oil outlets. The bearing is installed in the first mounting groove and the side end face abuts against the side end face of the annular protrusion. A double-ring oil seal and a mud and water oil seal are installed in the second mounting groove. The side end face of the double-ring oil seal abuts against the side end face of the bearing, and the side end face of the mud and water oil seal abuts against the inner end face of the annular protrusion. The anti-grass ring is installed in the third mounting groove and the side end face abuts against the side end face of the annular protrusion. The end of the rotating shaft passes through the anti-grass ring, mud and water oil seal, double-ring oil seal and bearing in sequence, and the anti-grass ring is connected to the rotating shaft by a key; the flange end of the bearing seat is connected to an end cover for axially tightening the bearing, and an oil filling port is opened on the end cover, and a plug is threadedly connected to the oil filling port. A sealing ring is provided at the connection between the end cover and the bearing seat.

[0006] The end surface of the annular protrusion is provided with two groups of annular positioning grooves of different diameters, the end surface of the grass-proof ring is provided with two groups of annular positioning blocks cooperating with the annular positioning grooves, and the oil outlet of the oil channel is located in the annular positioning groove with a small diameter.

[0007] The end of the rotating shaft is threadedly connected with a nut for tightening the bearing.

[0008] Beneficial effects of the utility model:

[0009] The utility model provides an oil inlet on the end cover where the rotary tiller shaft and the bearing are connected, so that oil is sent into the bearing. During the flow, the oil can carry the soil and dust inside the bearing and be discharged along the gap between the rotary shaft and the grass-proof ring, thereby realizing the self-cleaning function of the bearing, effectively solving the problems of reduced lubrication effect and increased wear of the bearing, further reducing the maintenance cost of the bearing, and ensuring the reliability of the rotary tiller. The user only needs to replenish or replace the lubricating oil regularly, without the need for complicated maintenance operations, thus saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0011] Figure 2 It is a schematic diagram of the internal structure of the bearing seat.

[0012] Figure 3 It is a three-dimensional schematic diagram of the bearing seat.

[0013] Figure 4 This is a schematic diagram of a weed-proof circle.

[0014] Figure 5 It is a three-dimensional schematic diagram of the rotating shaft. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0016] The utility model discloses a self-cleaning connection structure of a rotary tiller shaft, which mainly includes a rotary shaft 1, a bearing seat 2, a bearing 3, an end cover 4, a double-ring oil seal 5, a mud and water oil seal 6, an annular protrusion 7, and a weed prevention ring 8. The annular protrusion 7 is provided inside the bearing seat 2, and the interior of the bearing seat 2 is sequentially divided into a first cylindrical mounting groove 201, a second mounting groove 202 and a third mounting groove 203 by the annular protrusion 7. The diameters of the first mounting groove 201 and the third mounting groove 203 are both larger than the diameter of the second mounting groove 202. Two groups of inclined circular hole-shaped oil channels 701 are symmetrically provided at the end of the annular protrusion 7. The oil inlet of the oil channel 701 is connected to the first mounting groove 201, and the oil outlet is connected to the third mounting groove 203. The two groups of oil channels 7 01 The spacing of the oil inlet is greater than the spacing of the oil outlet. The bearing 3 is installed in the first mounting groove 201 and the side end face abuts the side end face of the annular protrusion 7. The second mounting groove 202 is installed with a double-ring oil seal 5 and a mud and water oil seal 6. The side end face of the double-ring oil seal 5 abuts the side end face of the bearing 3, and the side end face of the mud and water oil seal 6 abuts the inner end face of the annular protrusion 7. The anti-grass ring 8 is installed in the third mounting groove 203 and the side end face abuts the side end face of the annular protrusion 7. The end of the rotating shaft 1 passes through the anti-grass ring 8, mud and water oil seal 6, double-ring oil seal 5 and bearing 3 in sequence, and the anti-grass ring 8 is connected to the rotating shaft 1 by a key; the flange end of the bearing seat 2 is connected to an end cover 4 for axially tightening the bearing 3, and an oil filling port 401 is opened on the end cover 4. A plug is threadedly connected to the oil filling port 401, and a sealing ring is provided at the connection between the end cover 4 and the bearing seat 2.

[0017] The operator opens the plug at the oil filling port 401 on the end cover 4 and injects lubricating oil into the bearing seat 2 through the oil inlet 401, so that the lubricating oil flows into the bearing 3. During the flow of oil inside the bearing 3, it not only plays a lubricating role, but also physically carries soil and dust particles inside the bearing 3 along the oil channel 701 and flows into the gap at the connection between the rotating shaft 1 and the anti-grass ring 8. Due to the fluidity of the oil inside the bearing 3, the oil carrying impurities will be discharged to the outside of the bearing seat 2 along the gap at the connection between the rotating shaft 1 and the anti-grass ring 8, realizing the self-cleaning function of impurities inside the bearing 3 and avoiding the negative impact of impurities on the lubrication effect of the bearing 3. The user only needs to replenish or replace the lubricating oil inside the bearing 3 regularly, and there is no need to perform complicated cleaning and maintenance operations on the bearing 3, which greatly saves maintenance time and cost; with the flow of oil and the discharge of impurities, the inside of the bearing 3 can be kept clean, and at the same time, the lubrication effect is improved, thereby reducing the wear of the bearing 3 and extending the service life of the bearing 3.

[0018] The end face of the annular protrusion 7 is provided with two groups of annular positioning grooves 702 of different diameters, and the end face of the weed prevention ring 8 is provided with two groups of annular positioning blocks 801 that cooperate with the annular positioning grooves 702. The setting of the positioning blocks 801 helps to prevent weeds from entering the interior of the bearing 3; the oil outlet of the oil channel 701 is located in the annular positioning groove 702 with a small diameter, which can realize an integrated design of positioning and lubrication, and can provide lubrication at the contact point between the weed prevention ring 8 and the annular protrusion 7. The oil can also help clean the contact surface during the flow process, bring out tiny particles and dirt, reduce wear, and extend the service life of the components.

[0019] The end of the rotating shaft 1 is threadedly connected with a nut 9 for tightening the bearing 3; during the operation of the rotary tiller, the bearing 3 may become loose due to factors such as vibration and impact. The nut 9 fixes the bearing 3 in the bearing seat 2, which can prevent the bearing 3 from loosening due to external forces and ensure the stable operation of the machine; when the bearing 3 needs to be maintained or replaced, the nut 9 is loosened to remove or install a new bearing 3, thereby simplifying the maintenance work.

[0020] Working process:

[0021] The operator opens the plug at the oil filling port 401 on the end cover 4 and injects lubricating oil into the bearing seat 2 through the oil inlet 401, so that the lubricating oil flows into the bearing 3. During the flow of oil inside the bearing 3, it not only plays a lubricating role, but also physically carries soil and dust particles inside the bearing 3 along the oil channel 701 and flows into the gap at the connection between the rotating shaft 1 and the anti-grass ring 8. Due to the fluidity of the oil inside the bearing 3, the oil carrying impurities will be discharged to the outside of the bearing seat 2 along the gap at the connection between the rotating shaft 1 and the anti-grass ring 8, realizing the self-cleaning function of impurities inside the bearing 3 and avoiding the negative impact of impurities on the lubrication effect of the bearing 3. The user only needs to replenish or replace the lubricating oil inside the bearing 3 regularly, and there is no need to perform complicated cleaning and maintenance operations on the bearing 3, which greatly saves maintenance time and cost; with the flow of oil and the discharge of impurities, the inside of the bearing 3 can be kept clean, and at the same time, the lubrication effect is improved, thereby reducing the wear of the bearing 3 and extending the service life of the bearing 3.

[0022] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A self-cleaning connecting structure for a rotary tiller shaft, characterized by: The self-cleaning connecting structure of a rotary tiller shaft comprises a shaft (1), a bearing seat (2), a bearing (3), an end cover (4), a double-ring oil seal (5), a mud and water oil seal (6), an annular protrusion (7), and a weed prevention ring (8). The annular protrusion (7) is provided inside the bearing seat (2). The inside of the bearing seat (2) is sequentially divided by the annular protrusion (7) to form a cylindrical first mounting groove (201), a second mounting groove (202), and a third mounting groove (203). The diameters of the first mounting groove (201) and the third mounting groove (203) are both larger than the diameter of the second mounting groove (202). Two groups of inclined circular hole-shaped oil channels (701) are symmetrically opened at the end of the annular protrusion (7). The oil inlet of the oil channel (701) is connected to the first mounting groove (201), and the oil outlet is connected to the third mounting groove (203). The spacing between the oil inlets of the two groups of oil channels (701) is larger than the spacing between the oil outlets. The bearing (3) is installed in the first installation groove (201) and its side end face abuts against the side end face of the annular protrusion (7). The second installation groove (202) is installed with a double-ring oil seal (5) and a mud and water oil seal (6). The side end face of the double-ring oil seal (5) abuts against the side end face of the bearing (3), and the side end face of the mud and water oil seal (6) abuts against the inner end face of the annular protrusion (7). The grass-proof ring (8) is installed in the third installation groove (203) and its side end face abuts against the side end face of the annular protrusion (7). The end of the rotating shaft (1) passes through the anti-grass ring (8), the mud and water oil seal (6), the double-ring oil seal (5) and the bearing (3) in sequence, and the anti-grass ring (8) and the rotating shaft (1) are connected by a key; the flange end of the bearing seat (2) is connected with an end cover (4) for axially pressing the bearing (3), and an oil filling port (401) is opened on the end cover (4), and a plug is threadedly connected to the oil filling port (401), and a sealing ring is provided at the connection between the end cover (4) and the bearing seat (2).

2. The self-cleaning connecting structure for a rotary tiller shaft according to claim 1, characterized in that: The end surface of the annular protrusion (7) is provided with two groups of annular positioning grooves (702) of different diameters, the end surface of the grass-proof ring (8) is provided with two groups of annular positioning blocks (801) that cooperate with the annular positioning grooves (702), and the oil outlet of the oil channel (701) is located in the annular positioning groove (702) with a smaller diameter.

3. The self-cleaning connecting structure for a rotary tiller shaft according to claim 1 or 2, characterized in that: The end of the rotating shaft (1) is threadedly connected to a nut (9) for tightening the bearing (3).

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