A dustproof structure for connecting the shaft of a rotary tiller
By designing a labyrinth structure and a reamer to prevent weeds from getting tangled on the rotary tiller's shaft, the problem of dust entering the bearings is solved, the bearing life is extended, and the working efficiency and production efficiency of the rotary tiller are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGHAI HONGXING IND & TRADE CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-17
Smart Images
Figure CN224503954U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rotary tiller technology, specifically relating to a dustproof structure for connecting the rotary tiller shaft. Background Technology
[0002] With the increasing mechanization of agriculture, rotary tillers are widely used in agricultural land preparation, fundamentally freeing farmers' hands, improving work efficiency, and reducing labor costs. However, existing rotary tiller cutter shafts lack dustproof measures, allowing dust to easily enter the bearings at both ends of the shaft during operation. This increases bearing wear and friction, and in severe cases, directly damages the bearings, causing machine malfunctions, affecting both work efficiency and maintenance costs. Summary of the Invention
[0003] To overcome the problem in the prior art where dust easily enters the bearings at both ends of the cutter shaft, increasing bearing wear, friction, and in severe cases, directly damaging the bearings and causing machine malfunctions, thus affecting work efficiency and increasing maintenance costs, this utility model provides a dustproof structure for the rotary tiller's shaft connection. A labyrinthine structure is formed between the fixed end cover and the rotating end cover, effectively preventing soil from entering and dust from entering the bearings and other rotating parts, reducing wear, extending bearing life, and greatly improving the overall machine's work efficiency. The inclusion of a reamer to prevent weed entanglement solves the problem of weed entanglement during rotary tillage, improving production efficiency while ensuring tillage quality.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A dustproof structure for a rotary tiller shaft connection mainly includes a transmission box 1, an output shaft 2, a rotary tiller shaft 3, a fixed end cover 5, a rotating end cover 6, and a reamer 7. The output shaft 2 is installed through a bearing 4 at the bottom of the transmission box 1, and the transmission box 1 is connected to the output shaft 2 in a transmission connection. The rotary tiller shaft 3 is connected to the output shaft 2 in a transmission connection via a spline. The fixed end cover 5 is coaxial with the output shaft 2 and is installed at the end of the bearing seat of the transmission box 1 with screws. The rotating end cover 6, which rotates with the output shaft 2, is interference-fitted. The fixed end cover 5 is mounted on the output shaft 2. The outer end face of the fixed end cover 5 is provided with a coaxial first protruding ring 51, and a coaxial first groove 52 is formed between the first protruding rings 51. The inner side of the rotating end cover 6 is provided with a second groove 61 that matches the first protruding ring 51, and the inner side of the rotating end cover 6 is provided with a second protruding ring 62 that matches the first groove 52. The first protruding ring 51 is inserted into the second groove 61, and the second protruding ring 62 is inserted into the first groove 52 to form a labyrinth-type sealing structure. The reamer 7 is fixedly mounted on the rotary tiller shaft 3, and the reamer 7 is bent toward the fixed end cover 5 and the rotating end cover 6.
[0005] Furthermore, the rotating end cover 6 is provided with an annular limiting groove 63, and two arc-shaped limiting blocks 8 are installed on the outer end face of the fixed end cover 5 by bolts, with the inner end gap of the arc-shaped limiting blocks 8 embedded in the annular limiting groove 63.
[0006] Furthermore, the fixed end cover 5 is provided with an annular flange 53 that is clearance-fitted with the output shaft 2.
[0007] Furthermore, the fixed end cap 5 is provided with three first protruding rings 51 forming two first grooves 52.
[0008] The beneficial effects of this utility model are:
[0009] This utility model features a labyrinthine structure between the fixed and rotating end caps, effectively preventing soil from entering and dust from entering rotating components such as bearings. This reduces wear, extends bearing life, and significantly improves overall machine efficiency. The inclusion of a weed-resistant reamer solves the problem of weed entanglement during rotary tillage, ensuring tillage quality while increasing production efficiency. Attached Figure Description
[0010] Figure 1 This is a three-dimensional schematic diagram of the present invention.
[0011] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.
[0012] Figure 3 This is a partial cross-sectional perspective view of the present invention.
[0013] Figure 4 yes Figure 1 A magnified schematic diagram of the structure at point B in the middle.
[0014] Figure 5 This is a three-dimensional schematic diagram of a partial structure of this utility model. Detailed Implementation
[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.
[0016] This utility model discloses a dustproof structure for the rotary tiller shaft connection. The dustproof structure mainly includes a transmission box 1, an output shaft 2, a rotary tiller shaft 3, a fixed end cover 5, a rotating end cover 6, and a reamer 7. The output shaft 2 is mounted through a bearing 4 at the bottom of the transmission box 1, and the transmission box 1 is connected to the output shaft 2. The rotary tiller shaft 3 is connected to the output shaft 2 via a spline. The fixed end cover 5 is coaxial with the output shaft 2 and is mounted on the bearing seat end of the transmission box 1 with screws. The rotating end cover 6, which rotates with the output shaft 2, is interference-fitted onto the output shaft 2. A coaxial first convex ring 51 is provided on the outer end face of the fixed end cover 5. The first convex ring 51 is shaped as follows: The rotating end cover 6 has a first groove 52 that is coaxial with the first groove 52. The inner side of the rotating end cover 6 has a second groove 61 that matches the first convex ring 51. The inner side of the rotating end cover 6 has a second convex ring 62 that matches the first groove 52. The first convex ring 51 is inserted into the second groove 61, and the second convex ring 62 is inserted into the first groove 52 to form a labyrinth-type sealing structure. The reamer 7 is fixedly installed on the rotary tiller shaft 3. The reamer 7 is bent towards the fixed end cover 5 and the rotating end cover 6. The fixed end cover 5 and the rotating end cover 6 form a labyrinth-type structure, which effectively prevents soil from entering and dust from entering the rotating parts such as the bearing 4, reducing wear, extending the service life of the bearing, and greatly improving the working efficiency of the whole machine. The rotary tiller is equipped with a shovel 7 to prevent weeds from getting tangled. The shovel 7 rotates with the rotary tiller shaft 3 and rotates around the fixed end cover 5 and the rotating end cover 6. It stirs up weeds at any time. The shovel 7 has a certain distance from the fixed end cover 5 and the rotating end cover 6, which effectively prevents weeds from getting tangled on the rotating shaft. This solves the problem of weed tangling during rotary tillage and improves production efficiency while ensuring the quality of rotary tillage.
[0017] In this embodiment, the rotating end cover 6 is provided with an annular limiting groove 63, and two arc-shaped limiting blocks 8 are installed on the outer end face of the fixed end cover 5 by bolts. The inner end gap of the arc-shaped limiting blocks 8 is embedded in the annular limiting groove 63. The arc-shaped limiting blocks 8 increase the axial direction limitation of the rotating end cover 6, ensuring the stable operation of the rotating end cover 6.
[0018] In this embodiment, the fixed end cover 5 is provided with an annular flange 53 that is clearance-fitted with the output shaft 2. The annular flange 53 and the output shaft 2 form a clearance fit, which prevents dust from entering and reduces the gap between the annular flange 53 and the output shaft 2, thereby reducing rotational resistance.
[0019] In this embodiment, the fixed end cap 5 is provided with three first protruding rings 51 forming two first grooves 52.
[0020] Work process:
[0021] The fixed end cover 5 and the rotating end cover 6 form a labyrinth structure, effectively preventing soil from entering and dust from entering rotating parts such as the bearing 4, reducing wear, extending the service life of the bearings, and greatly improving the overall working efficiency of the machine. A reamer 7 is provided to prevent weed entanglement. The reamer 7 rotates with the rotary tiller shaft 3, rotating around the outer periphery of the fixed end cover 5 and the rotating end cover 6, constantly agitating weeds. The reamer 7 has a certain distance from the fixed end cover 5 and the rotating end cover 6, effectively preventing weeds from entangled on the rotating shaft, solving the problem of weed entanglement during rotary tillage, and improving production efficiency while ensuring the quality of rotary tillage. An arc-shaped limiting block 8 further limits the axial direction of the rotating end cover 6, ensuring stable operation of the rotating end cover 6.
[0022] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.
Claims
1. A rotary cultivator rotating shaft connection dustproof structure, comprising a transmission box (1), an output shaft (2) and a rotary cultivator shaft (3), the output shaft (2) is installed through the bottom of the transmission box (1) by a bearing (4), the transmission box (1) is in transmission connection with the output shaft (2), and the rotary cultivator shaft (3) is in transmission connection with the output shaft (2) through a spline, characterized in that: It also includes a fixed end cap (5), a rotating end cap (6), and a reamer (7). The fixed end cap (5) is coaxial with the output shaft (2) and is installed at the end of the bearing seat of the transmission box (1) by screws. The rotating end cap (6), which rotates with the output shaft (2), is interference-fitted onto the output shaft (2). The outer end face of the fixed end cap (5) is provided with a coaxial first convex ring (51). A coaxial first groove (52) is formed between the first convex rings (51). The inner side of the rotating end cap (6) is provided with a second groove (61) that matches the first convex ring (51). The inner side of the rotating end cap (6) is provided with a second convex ring (62) that matches the first groove (52). The first convex ring (51) is inserted into the second groove (61), and the second convex ring (62) is inserted into the first groove (52) to form a labyrinth-type sealing structure. The reamer (7) is fixedly installed on the rotary tiller shaft (3). The reamer (7) is bent toward the fixed end cap (5) and the rotating end cap (6). 2. The rotary tiller shaft connection dustproof structure according to claim 1, characterized in that: The rotating end cover (6) is provided with an annular limiting groove (63), and two arc-shaped limiting blocks (8) are installed on the outer end face of the fixed end cover (5) by bolts. The inner end gap of the arc-shaped limiting block (8) is embedded in the annular limiting groove (63).
3. A rotary cultivator rotating shaft connection dustproof structure according to claim 1 or 2, characterized in that: The fixed end cover (5) is provided with an annular flange (53) that is clearance-fitted with the output shaft (2).
4. The rotary tiller shaft connection dustproof structure according to claim 3, characterized in that: The fixed end cap (5) is provided with three first protruding rings (51) forming two first grooves (52).