Output structure of small agricultural machine walking box

Abstract

The utility model provides an output structure of a walking box of a small agricultural machine. The output structure solves the problem that an output shaft of an existing tillage machine swings too much due to the fact that the output shaft adopts a tapered roller bearing. The walking mechanism comprises a walking box, a side cover and an output shaft arranged in the walking box and the side cover in a penetrating mode, a first deep groove ball bearing is arranged between the output shaft and the walking box, a second deep groove ball bearing and a thrust ball bearing are arranged between the output shaft and the side cover, and the second deep groove ball bearing is located between the first deep groove ball bearing and the thrust ball bearing and abuts against the thrust ball bearing. A driven bevel gear disposed on the output shaft is positioned between the first deep groove ball bearing and the second deep groove ball bearing. A traditional tapered roller bearing is replaced by the second deep groove ball bearing and the thrust ball bearing, the output shaft and the driven bevel gear are effectively limited in the axial direction and the radial direction, stability is improved, and the situation that the output shaft swings excessively is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of tillage technology and relates to the output structure of a small agricultural machinery walking box. Background Technology

[0002] Farming is an essential part of agricultural production, and with the development of productivity, mechanized operations are increasingly widely used in agricultural production. In hilly areas, due to geographical limitations, large agricultural machinery is not suitable for production operations, requiring small agricultural tillers. Traditional tillers use tapered roller bearings to support the output shaft of the driven travel box, as shown in the tiller output shaft mounting structure disclosed in Chinese Patent No. CN219205181 U, where a tapered roller bearing is provided between one end of the support shaft and the travel box body, and a deep groove ball bearing is provided between the other end and the travel box body.

[0003] The aforementioned tiller's output shaft, due to the use of tapered roller bearings, suffers from the following problems: 1. Difficult clearance adjustment and high manual assembly requirements; 2. Excessive swaying of the output shaft during operation, resulting in poor stability; 3. Frequent damage to the oil seal due to instability, leading to oil leakage and severe damage to the gearbox; 4. Excessive swaying causing poor gear engagement, frequently damaging gears and the gearbox, rendering it inoperable; 5. High market maintenance costs, severely impacting agricultural production; 6. High requirements for gear machining, hindering cost control. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a stable output structure for a small agricultural machinery walking box.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] The output structure of the small agricultural machinery travel box includes a travel box, a side cover, and an output shaft passing through the travel box and the side cover. A first deep groove ball bearing is provided between the output shaft and the travel box, and a second deep groove ball bearing and a thrust ball bearing are provided between the output shaft and the side cover. The second deep groove ball bearing is located between the first deep groove ball bearing and the thrust ball bearing and abuts against the thrust ball bearing. The driven bevel gear on the output shaft is positioned between the first deep groove ball bearing and the second deep groove ball bearing.

[0007] This output structure replaces the traditional tapered roller bearings with second deep groove ball bearings and thrust ball bearings, effectively limiting the output shaft and driven bevel gear in the axial and radial directions, improving stability and preventing excessive output shaft sway.

[0008] In the output structure of the aforementioned small agricultural machinery walking box, the walking box is provided with a first through hole, the side cover is provided with a second through hole coaxially arranged with the first through hole, the output shaft is coaxially inserted into the first through hole and the second through hole, the first through hole is provided with a first annular step, the outer ring of the first deep groove ball bearing abuts against the first annular step, the second through hole is provided with a second annular step, one of the races of the thrust ball bearing abuts against the second annular step, the inner ring of the second deep groove ball bearing abuts against the other race of the thrust ball bearing, and the driven bevel gear is positioned between the inner rings of the first deep groove ball bearing and the inner rings of the second deep groove ball bearing.

[0009] In the output structure of the above-mentioned small agricultural machinery walking box, the inner end of the second through hole has a mounting hole with a diameter larger than that of the second through hole, and the outer ring surface of the second deep groove ball bearing is installed in the mounting hole.

[0010] In the output structure of the aforementioned small agricultural machinery walking box, a bushing is fitted on the output shaft. One end of the bushing abuts against the inner ring of the first deep groove ball bearing, and the other end of the bushing abuts against the driven bevel gear.

[0011] In the output structure of the above-mentioned small agricultural machinery walking box, a sleeve is fitted on the output shaft. The first deep groove ball bearing, bushing, driven bevel gear, second deep groove ball bearing and thrust ball bearing are all installed on the output shaft. The sleeve is provided with a third annular step and a fourth annular step. The end of the bushing near the driven bevel gear abuts against the third annular step, and the inner ring of the second deep groove ball bearing abuts against the fourth annular step.

[0012] In the output structure of the above-mentioned small agricultural machinery walking box, the output shaft is a hexagonal shaft, and the sleeve body is provided with a hexagonal hole that mates with the hexagonal shaft.

[0013] In the output structure of the above-mentioned small agricultural machinery walking box, a first oil seal is provided between the walking box and the sleeve body, located in the first through hole, and a second oil seal is provided between the side cover and the sleeve body, located in the second through hole.

[0014] In the output structure of the above-mentioned small agricultural machinery walking box, the walking box is provided with a first end cover for preventing the first oil seal from falling off, and the side cover is provided with a second end cover for preventing the second oil seal from falling off.

[0015] In the output structure of the aforementioned small agricultural machinery walking box, the side cover is fixedly connected to the walking box by bolts.

[0016] Compared with existing technologies, the output structure of this small agricultural machinery walking box has the following advantages: It replaces the traditional tapered roller bearings with second deep groove ball bearings and thrust ball bearings, effectively limiting the output shaft and driven bevel gear in the axial and radial directions, resulting in good stability, easy control of gear clearance, stable product quality, and less risk of oil seal damage during use; due to the small output shaft sway, the driven bevel gear and driving bevel gear mesh perfectly, preventing gear breakage and box damage even under heavy loads, reducing maintenance costs, minimizing negative impacts, and improving operating efficiency; it has less stringent processing requirements, greatly saving production costs, while also allowing for fast assembly, significantly increasing production capacity. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the output structure of the walking box of a small agricultural machine.

[0018] In the diagram, 1. Traveling gearbox; 2. Side cover; 3. Output shaft; 4. First deep groove ball bearing; 5. Second deep groove ball bearing; 6. Thrust ball bearing; 7. Driven bevel gear; 8. First through hole; 9. Second through hole; 10. First annular step; 11. Second annular step; 12. Mounting hole; 13. Bushing; 14. Sleeve body; 15. Third annular step; 16. Fourth annular step; 17. First oil seal; 18. Second oil seal; 19. First end cover; 20. Second end cover; 21. Drive bevel gear. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 The output structure of the small agricultural machinery walking box 1 includes a walking box 1, a side cover 2, and an output shaft 3 passing through the walking box 1 and the side cover 2. The side cover 2 is fixed to the walking box 1 by bolts. The output shaft 3 is provided with a sleeve 14. The output shaft 3 is a hexagonal shaft. The sleeve 14 is provided with a hexagonal hole that mates with the hexagonal shaft. A driven bevel gear 7 is provided on the sleeve 14. A driving bevel gear 21 is rotatably provided inside the walking box 1. The driven bevel gear 7 meshes with the driving bevel gear 21.

[0021] like Figure 1 As shown, the traveling box 1 has a first through hole 8, and the side cover 2 has a second through hole 9 coaxially arranged with the first through hole 8. The sleeve 14 is coaxially inserted into the first through hole 8 and the second through hole 9. In order to limit the movement of the sleeve 14, as shown... Figure 1As shown, a first deep groove ball bearing 4 is provided between the sleeve 14 and the traveling box 1, and a second deep groove ball bearing 5 and a thrust ball bearing 6 are provided between the sleeve 14 and the side cover 2. The second deep groove ball bearing 5 is located between the first deep groove ball bearing 4 and the thrust ball bearing 6 and abuts against the thrust ball bearing 6. The driven bevel gear 7 is positioned between the first deep groove ball bearing 4 and the second deep groove ball bearing 5. By replacing the traditional tapered roller bearing with the second deep groove ball bearing 5 and the thrust ball bearing 6, the output shaft 3 and the driven bevel gear 7 are effectively limited in the axial and radial directions, improving stability and preventing excessive swaying of the output shaft 3.

[0022] like Figure 1 As shown, a first annular step 10 is provided at the first through hole 8, and the outer ring of the first deep groove ball bearing 4 abuts against the first annular step 10. A second annular step 11 is provided in the second through hole 9. The second annular step 11 is arranged opposite to the first annular step 10. The seat ring of the thrust ball bearing 6 located on one side of the side cover 2 abuts against the second annular step 11. The inner ring of the second deep groove ball bearing 5 abuts against the seat ring of the thrust ball bearing 6 located on one side of the travel box 1. The driven bevel gear 7 is positioned between the inner ring of the first deep groove ball bearing 4 and the inner ring of the second deep groove ball bearing 5.

[0023] To achieve radial positioning of the second deep groove ball bearing 5, such as Figure 1 As shown, the inner end of the second through hole 9 has a mounting hole 12 with a diameter larger than that of the second through hole 9, and the outer ring surface of the second deep groove ball bearing 5 is installed in the mounting hole 12.

[0024] In order to axially limit the driven bevel gear 7, such as Figure 1 As shown, a bushing 13 is fitted on the output shaft 3. The bushing 13 is located at one end of the travel box 1 and abuts against the inner ring of the first deep groove ball bearing 4. The bushing 13 is located at one end of the side cover 2 and abuts against the driven bevel gear 7.

[0025] In order to axially limit the sleeve 14, such as Figure 1 As shown, the sleeve 14 is provided with a third annular step 15 and a fourth annular step 16. The end of the bushing 13 near the driven bevel gear 7 abuts against the third annular step 15, and the inner ring of the second deep groove ball bearing 5 abuts against the fourth annular step 16.

[0026] like Figure 1 As shown, a first oil seal 17 is provided between the traveling box 1 and the sleeve 14, located in the first through hole 8, and a second oil seal 18 is provided between the side cover 2 and the sleeve 14, located in the second through hole 9.

[0027] To prevent the first oil seal 17 and the second oil seal 18 from falling off, such as Figure 1 As shown, a first end cover 19 is provided on the walking box 1, and a second end cover 20 is provided on the side cover 2.

[0028] During installation, first install the first deep groove ball bearing 4 onto the first annular step 10, then insert the sleeve 14 with bushing 13 into the first deep groove ball bearing 4, and then install the driven bevel gear 7, the second deep groove ball bearing 5 and the thrust ball bearing 6 onto the sleeve 14 in sequence, ensuring that the driven bevel gear 7 meshes with the driving bevel gear 21. Then install the side cover 2 and fix the side cover 2 to the traveling box 1 with bolts. Finally, install the first oil seal 17 and the second oil seal 18, and set the first end cover 19 and the second end cover 20. The installation is convenient.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An output structure for a small agricultural machinery travel box (1), comprising a travel box (1), a side cover (2), and an output shaft (3) passing through the travel box (1) and the side cover (2), wherein a first deep groove ball bearing (4) is provided between the output shaft (3) and the travel box (1), characterized in that, A second deep groove ball bearing (5) and a thrust ball bearing (6) are provided between the output shaft (3) and the side cover (2). The second deep groove ball bearing (5) is located between the first deep groove ball bearing (4) and the thrust ball bearing (6) and abuts against the thrust ball bearing (6). The driven bevel gear (7) provided on the output shaft (3) is positioned between the first deep groove ball bearing (4) and the second deep groove ball bearing (5).

2. The output structure of the small agricultural machinery walking box (1) according to claim 1, characterized in that, The traveling box (1) is provided with a first through hole (8), and the side cover (2) is provided with a second through hole (9) coaxially arranged with the first through hole (8). The output shaft (3) is coaxially inserted into the first through hole (8) and the second through hole (9). A first annular step (10) is provided at the first through hole (8). The outer ring of the first deep groove ball bearing (4) abuts against the first annular step (10). A second annular step (11) is provided in the second through hole (9). One of the races of the thrust ball bearing (6) abuts against the second annular step (11). The inner ring of the second deep groove ball bearing (5) abuts against the other race of the thrust ball bearing (6). The driven bevel gear (7) is positioned between the inner ring of the first deep groove ball bearing (4) and the inner ring of the second deep groove ball bearing (5).

3. The output structure of the small agricultural machinery walking box (1) according to claim 2, characterized in that, The inner end of the second through hole (9) has a mounting hole (12) with a diameter larger than that of the second through hole (9), and the outer ring surface of the second deep groove ball bearing (5) is installed in the mounting hole (12).

4. The output structure of the small agricultural machinery walking box (1) according to claim 2 or 3, characterized in that, A bushing (13) is fitted on the output shaft (3). One end of the bushing (13) abuts against the inner ring of the first deep groove ball bearing (4), and the other end of the bushing (13) abuts against the driven bevel gear (7).

5. The output structure of the small agricultural machinery walking box (1) according to claim 4, characterized in that, A sleeve (14) is fitted on the output shaft (3). The first deep groove ball bearing (4), bushing (13), driven bevel gear (7), second deep groove ball bearing (5) and thrust ball bearing (6) are all mounted on the output shaft (3). The sleeve (14) is provided with a third annular step (15) and a fourth annular step (16). The end of the bushing (13) near the driven bevel gear (7) abuts against the third annular step (15), and the inner ring of the second deep groove ball bearing (5) abuts against the fourth annular step (16).

6. The output structure of the small agricultural machinery walking box (1) according to claim 5, characterized in that, The output shaft (3) is a hexagonal shaft, and the sleeve (14) is provided with a hexagonal hole that mates with the hexagonal shaft.

7. The output structure of the small agricultural machinery walking box (1) according to claim 2, characterized in that, A first oil seal (17) is provided between the walking box (1) and the sleeve (14) in the first through hole (8), and a second oil seal (18) is provided between the side cover (2) and the sleeve (14) in the second through hole (9).

8. The output structure of the small agricultural machinery walking box (1) according to claim 7, characterized in that, The traveling box (1) is provided with a first end cap (19) to prevent the first oil seal (17) from falling off, and the side cover (2) is provided with a second end cap (20) to prevent the second oil seal (18) from falling off.

9. The output structure of the small agricultural machinery walking box (1) according to claim 1, characterized in that, The side cover (2) is fixed to the traveling box (1) by bolts.

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