Rotary cultivator bearing protection structure

Abstract

The utility model discloses a rotary cultivator bearing protection structure which comprises a rotary cultivator cutter shaft, a cutter holder is installed at one end of the rotary cultivator cutter shaft, a cutter is installed on the cutter holder, the cutter holder is tightly attached to a bearing seat, a first sealing gasket is arranged on the inner side of the bearing seat, a bearing is installed on the inner side of the first sealing gasket, and the bearing is fixed to the tail end of the rotary cultivator cutter shaft through a clamping spring. A bearing cover is arranged at the outer end of the bearing seat, a second sealing gasket is arranged between the bearing cover and the bearing seat, and an oil injection hole is formed in the upper end of the bearing cover and sealed by a sealing plug. The structure is simple, the cutters are arranged on the inner sides of the bearing seats, weeds can be effectively removed, and the rotary cultivator cutter shaft is prevented from being wound by the weeds. The rotary cultivator cutter shaft and the bearing seat as well as the bearing seat and the bearing cover are sealed at multiple positions, so that soil is prevented from entering the bearing. By means of the structure, abrasion of the cutter shaft of the rotary cultivator is avoided, and working stability of the rotary cultivator is guaranteed. The rotary cultivator is especially suitable for installation and use in paddy fields.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery and equipment, in particular to a bearing protection structure of a rotary tiller. Background Art

[0002] A rotary tiller is a commonly used field tillage machine driven by tractor power. It can effectively cut off the root and stubble of crops and bury them in the soil. After tilling, the surface is loose and flat, which is convenient for sowing operations. Rotary tillers are divided into two types according to the configuration of their rotary tiller blade shafts: horizontal axis type and vertical axis type. Regardless of the type of rotary tiller, it is a driven soil tillage machine with a rotating rotary tiller blade shaft assembly as the working part. Since the rotary tiller blade shaft assembly of the rotary tiller is installed on the frame through a bearing seat, the existing bearing seat structure, such as Figure 3 As shown, a bearing seat 3' is fixed at one end of the rotary tiller blade shaft 1', and a sealing ring 2' is provided between the bearing seat 3' and the blade shaft 1'. However, the sealing ring 2' is easily damaged during operation, resulting in a gap, which allows weeds to entangle, and soil is also easy to enter the bearing seat 3'. A sealing gasket 4' is also provided between the bearing seat 3' and the bearing cover 5', and the skirt of the sealing gasket 4' is exposed and easy to wear. With this bearing seat structure, soil and weeds are very easy to enter the bearing seat in a harsh working environment, which not only causes wear on the rotary tiller blade shaft of the rotary tiller, but also affects the stability of the rotary tiller. In severe cases, the bearing may even be entangled, making it unable to work. This situation is particularly prominent in paddy field rotary tillers. Utility Model Content

[0003] The utility model aims to provide a rotary tiller bearing protection structure to prevent weeds from being entangled and soil from entering into the rotary tiller bearing seat.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a rotary tiller bearing protection structure, which is arranged at the end of a rotary tiller blade shaft and is used to protect the bearing. The structure comprises a rotary tiller blade shaft, a cutter seat is installed at one end of the rotary tiller blade shaft, a cutter is installed on the cutter seat, the cutter seat is tightly attached to a bearing seat, a first sealing gasket is provided on the inner side of the bearing seat, a bearing is installed on the inner side of the first sealing gasket, the bearing is fixed to the tail end of the rotary tiller blade shaft by a retaining spring, a bearing cover is provided at the outer end of the bearing seat, a second sealing gasket is provided between the bearing cover and the bearing seat, an oil filling hole is provided at the upper end of the bearing cover, and the oil filling hole is sealed by a sealing plug.

[0006] Preferably, the cutter seat and the rotary tiller shaft are axially fixed by a positioning key.

[0007] Preferably, the cutter seat is a conical fixed seat, a cross-shaped fixed boss is provided on the conical surface, the cutter is mounted on the cross-shaped fixed boss, the cutter is inclined, a clearance groove is provided on the back of the cutter seat, and an elastic retaining ring is provided at the clearance groove.

[0008] Preferably, a plane step is provided at the upper end of the bearing cover, an oil filling hole is provided at the plane step, the oil filling hole is sealed by a sealing plug, and a boss is provided at the oil filling hole inside the bearing cover.

[0009] Preferably, a groove is provided at the boss of the second sealing gasket corresponding to the oil filling hole of the bearing cover, the second sealing gasket and the bearing cover correspond in shape and fit tightly, and the second sealing skirt is stuck in the bearing cover.

[0010] Preferably, the sealing plug comprises a sealing ring.

[0011] Preferably, a positioning convex ring edge is provided on the bottom end surface of the bearing seat flange, and the positioning convex ring edge extends into the positioning groove inside the bearing cover. A second sealing gasket is provided between the bearing seat and the bearing cover, and the bearing seat and the bearing cover flange are fitted together, and the bearing seat and the bearing cover are fixed to the rotary tiller frame with bolts.

[0012] Preferably, the first sealing gasket is stuck in the bearing seat and fits tightly with the rotary tiller blade shaft.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model discloses a rotary tiller bearing protection structure. A cutter is installed inside the rotary tiller bearing seat, which can effectively remove weeds and prevent weeds from winding around the rotary tiller blade shaft. The rotary tiller blade shaft and the bearing seat, the bearing seat and the bearing cover are sealed, and multiple seals are provided to prevent soil from entering the bearing. The wear of the rotary tiller blade shaft of the rotary tiller is avoided, and the working stability of the rotary tiller is ensured. The utility model is particularly suitable for installation and use of paddy field rotary tillers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the bearing protection structure of the rotary tiller of the utility model;

[0017] Figure 2 It is a left-side structural schematic diagram of the bearing protection structure of the rotary tiller of the utility model.

[0018] Figure 3 It is a schematic diagram of the bearing mechanism of an existing rotary tiller.

[0019] In the figure: 1', rotary tiller blade shaft; 2', sealing ring; 3', fixed bearing seat; 4', sealing pad; 5', bearing cover;

[0020] 1. Rotary tiller blade shaft; 2. Cutter seat; 3. Cutter; 4. Bearing seat; 5. First sealing gasket; 6. Bearing; 7. Second sealing gasket; 8. Sealing plug; 9. Bearing cover; 10. Retaining spring; 11. Positioning key; 12. Circlip; 13. Rotary tiller frame. DETAILED DESCRIPTION

[0021] The core of the utility model is to provide a rotary tiller bearing protection structure to prevent weeds and soil from entering the bearing seat and ensure the working stability of the rotary tiller.

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the main cross-sectional structure of the bearing protection structure of the rotary tiller of the utility model; Figure 2 It is a left-side structural schematic diagram of the bearing protection structure of the rotary tiller of the utility model.

[0025] In a specific embodiment, Figures 1-2 As shown, the bearing protection structure of the rotary tiller of the utility model is arranged at the end of the rotary tiller blade shaft to protect the bearing. A cutter seat 2 is installed at one end of the rotary tiller blade shaft 1, and a clearance groove is arranged on the back of the cutter seat 2, and an elastic retaining ring is arranged at the clearance groove. There is a positioning key 11 in the cutter seat 2, which is axially fixed to the rotary tiller blade shaft 1. The cutter seat 2 is a conical fixed seat, and a cross-shaped fixed boss is arranged on the conical surface. The cutter 3 is installed on the cross-shaped fixed boss. The cutter 3 is inclined. The cutter 3 rotates with the rotary tiller blade shaft to remove the entangled weeds in time.

[0026] In a specific embodiment, Figures 1-2As shown, a first sealing gasket 5 is provided on the inner side of the bearing seat 4, and the first sealing gasket 5 is tightly combined with the rotary tiller blade shaft 1. The inner wall of the first sealing gasket 5 is smooth, and the rotary tiller blade shaft 1 can rotate on the first sealing gasket 5, which can prevent soil from entering the bearing 6 from the gap between the bearing seat 4 and the rotary tiller blade shaft 1. The first sealing gasket 5 is T-shaped, with a step at the front end, and an axial limit step at the step surface, which can penetrate into the groove of the bearing seat 4 during installation and be fixed reliably. The bearing 6 is installed at the rear end of the first sealing gasket 5, and the bearing 6 is fixed to the tail end of the rotary tiller blade shaft 1 by a retaining ring 10. A bearing cover 9 is provided at the outer end of the bearing seat 4, and a second sealing gasket 7 is provided between the bearing cover 9 and the bearing seat 4. An oil filling hole is provided at the upper end of the bearing cover 9, and the oil filling hole is sealed by a sealing plug 8.

[0027] Specifically, a plane step is provided at the upper end of the bearing cover 9, and an oil filling hole is provided at the plane step. The oil filling hole is fixed by a sealing plug 8, and the sealing plug 8 contains a sealing ring to prevent oil leakage. A boss is provided inside the bearing 9 corresponding to the oil filling hole. The second sealing gasket 7 has a groove corresponding to the oil filling hole of the bearing cover 9. The second sealing gasket 7 and the bearing cover 9 have corresponding shapes and fit tightly. The second sealing gasket 7 has an oil guide hole, and the mouth of the oil guide hole is an elastic structure. The lubricating oil is injected from the oil filling hole without opening the bearing cover 8, which is simple and labor-saving.

[0028] In a specific embodiment, Figures 1-2 As shown, the bottom end surface of the bearing seat 4 is provided with a positioning convex ring edge, which is inserted into the positioning groove inside the bearing cover 9. A second sealing gasket 7 is provided between the bearing seat 4 and the bearing cover 9. The skirt of the second sealing gasket 7 is stuck in the bearing cover 9. The bearing seat 4 and the bearing cover 9 are fastened with bolts at the flange, which not only protects the skirt from damage, but also prevents oil leakage and external soil from entering, effectively ensuring the service life of the rotary tiller blade. The bearing seat 4 and the bearing cover 9 are fixed to the rotary tiller frame 13 with bolts.

[0029] When the utility model is in use, a cutter 3 is installed on one side of the rotary tiller bearing seat 4, which can effectively remove weeds and prevent weeds from winding around the rotary tiller blade shaft 1. A first sealing gasket 5 is provided between the rotary tiller blade shaft 1 and the bearing seat 4, which can prevent mud from entering the bearing 6 from the gap between the bearing seat 4 and the rotary tiller blade shaft 1; a second sealing gasket 7 is provided between the bearing seat 4 and the bearing cover 9, and the skirt of the second sealing gasket 7 is stuck in the bearing cover 9, which can prevent mud from entering the bearing 6 and protect the skirt of the second sealing gasket 7 from being worn. An oil filling hole is provided on the bearing cover 9, and an oil filling hole is also provided on the corresponding sealing gasket. Without disassembling the bearing cover 9, lubricating oil is injected into the bearing 6 from time to time, which prevents the rotary tiller blade shaft 1 from being worn and ensures the stability of the rotary tiller. It is particularly suitable for installation and use of paddy field rotary tillers.

[0030] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0031] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A rotary tiller bearing protection structure, arranged at the end of a rotary tiller blade shaft, for protecting the bearing, characterized in that: The invention comprises a cutter seat (2), a cutter (3) being mounted on the cutter seat (2), a bearing seat (4) being provided at the rear end of the cutter seat (2), a first sealing gasket (5) being provided on the inner side of the bearing seat (4), a bearing (6) being provided on the inner side of the first sealing gasket (5), the bearing (6) being fixed to the rear end of the rotary tiller blade shaft (1) by a retaining ring (10), a bearing cover (9) being provided at the outer end of the bearing seat (4), a second sealing gasket (7) being provided between the bearing cover (9) and the bearing seat (4), an oil filling hole being provided at the upper end of the bearing cover (9), and the oil filling hole being sealed by a sealing plug (8).

2. The rotary tiller bearing protection structure according to claim 1, characterized in that: The cutter seat (2) and the rotary tiller blade shaft (1) are axially fixed by a positioning key (11).

3. The rotary tiller bearing protection structure according to claim 2, characterized in that: The cutter seat (2) is a conical fixed seat, and a cross-shaped fixed boss is provided on the conical surface. The cutter (3) is installed on the cross-shaped fixed boss. The cutter (3) is inclined. A clearance groove is provided on the back of the cutter seat (2), and an elastic retaining ring (12) is provided at the clearance groove.

4. The rotary tiller bearing protection structure according to claim 1, characterized in that: The upper end of the bearing cover (9) is provided with a plane step, and an oil filling hole is provided at the plane step. The oil filling hole is sealed by a sealing plug (8), and a boss is provided inside the bearing cover (9).

5. The rotary tiller bearing protection structure according to claim 1, characterized in that: The second sealing gasket (7) is provided with a groove at the boss corresponding to the oil filling hole of the bearing cover (9); the second sealing gasket (7) and the bearing cover (9) correspond in shape and fit tightly; the skirt of the second sealing gasket (7) is stuck in the bearing cover (9).

6. The rotary tiller bearing protection structure according to claim 4, characterized in that: The sealing plug (8) comprises a sealing ring.

7. The rotary tiller bearing protection structure according to claim 5, characterized in that: The bottom end surface of the flange of the bearing seat (4) is provided with a positioning convex ring edge, and the positioning convex ring edge extends into the positioning groove inside the bearing cover (9). The second sealing gasket (7) is provided between the bearing seat (4) and the bearing cover (9). The flanges of the bearing seat (4) and the bearing cover (9) are fitted together, and the bearing seat (4) and the bearing cover (9) are fixed to the rotary tiller frame (13) by bolts.

8. The rotary tiller bearing protection structure according to claim 1, characterized in that: The first sealing gasket (5) is clamped in the bearing seat (4) and fits tightly with the rotary tiller blade shaft (1).

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