Three-cam type gearbox of drill seeder
The three-cam gearbox structure solves the problem that existing row seeder gearboxes cannot simultaneously achieve linear stepless adjustment, continuous and uniform seed sowing, and lodging resistance, thereby improving land utilization and yield, and adapting to diverse agronomic environments.
Patent Information
- Application Number
- CN202520134401.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing row seeder gearboxes cannot simultaneously meet the comprehensive needs of linear stepless adjustment, ensuring continuous and uniform seed sowing, improving land utilization, enhancing lodging resistance, and adapting to diverse agronomic environments.
It adopts a three-cam gearbox structure, which eliminates the switching interval between cams through the combination of one-way clutch bearing, swing arm body, stroke swing rod, cam body and stroke roller, ensuring continuous and uniform seed sowing, enhancing lodging resistance and adapting to various agronomic environments.
It achieves linear stepless adjustment within a certain range, avoids seed discontinuity, improves land utilization, enhances lodging resistance, increases yield, and adapts to diverse agronomic environments.
Smart Images
Figure CN223549748U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural technology, and in particular to a three-cam gearbox for a strip seeder. Background Technology
[0002] Currently, the gearboxes commonly used in row seeders on the market are either tower wheel type or multiple sets of gears with different numbers of teeth that can be changed to achieve various transmission ratios. However, the speed ratios are limited, changing them is inconvenient, and they cannot meet the needs of diverse agronomic practices. They also have disadvantages such as being limited and having high time costs.
[0003] The more advanced row seeder gearbox structure is a cam-type stepless adjustment, with a double cam structure that can achieve linear stepless adjustment within a certain range. However, this method has intermittent seeding, which may result in seeds being sown intermittently, wasting soil and, under certain circumstances, lacking the ability to resist lodging.
[0004] Existing row seeder gearboxes, whether traditional tower wheel type, gear replacement type, or more advanced dual cam continuously variable transmission, cannot simultaneously meet the comprehensive needs of achieving linear stepless adjustment within a certain range, ensuring continuous and uniform seed sowing, improving land utilization, enhancing lodging resistance, increasing yield, and adapting to diverse agronomic environments. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a three-cam gearbox for row seeders, aiming to improve the problem that existing row seeder gearboxes, whether traditional tower wheel type, gear replacement type, or the more advanced dual-cam continuously variable transmission, cannot simultaneously meet the comprehensive needs of achieving linear stepless adjustment within a certain range, ensuring continuous and uniform seed sowing, improving land utilization, enhancing lodging resistance, increasing yield, and adapting to a variety of agronomic environments.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A three-cam gearbox for a row seeder includes a one-way clutch bearing. The inner wall of the one-way clutch bearing is provided with a gearbox output shaft. The outer wall of the gearbox output shaft is provided with a rocker arm body. The outer wall of the rocker arm body is provided with a stroke rocker arm. A rocker arm tension spring is provided at the end of the stroke rocker arm. A stroke roller is provided at the front end of the stroke rocker arm. A cam body is slidably connected to the upper surface of the stroke rocker arm. The inner wall of the cam body is provided with a gearbox input shaft. A limit rail is provided on the outer wall of the rocker arm tension spring. A rail groove is formed on the inner wall of the limit rail. The outer wall of the stroke roller is slidably connected to the inner wall of the rail groove.
[0008] Preferably, the rear outer wall of the limiting slide rail is fixedly connected to the gearbox housing, the inner wall of the gearbox housing is disposed on the outer wall of the gearbox output shaft, the inner wall of the gearbox housing is disposed on the outer wall of the limiting slide rail, and the inner wall of the gearbox housing is disposed on the outer wall of the gearbox input shaft.
[0009] Preferably, the inner wall of the gearbox housing is threaded with a lower limit screw for the slide rail, and the inner wall of the gearbox housing is threaded with an upper limit screw for the slide rail.
[0010] Preferably, the outer wall of the limiting slide rail is provided with a gearbox adjustment indicator, the outer wall of the gearbox adjustment indicator is slidably connected with a gearbox indicator scale plate, and the rear outer wall of the gearbox indicator scale plate is provided with a seed box.
[0011] Preferably, the one-way clutch bearing, the rocker arm body, the stroke rocker arm, the rocker arm tension spring, the cam body, and the stroke roller form a set of stroke rocker arms, and the stroke rocker arms are arranged in three sets in a longitudinal distribution inside the gearbox housing.
[0012] Preferably, only the cam body of the stroke swing arm is arranged at 120°, and the cam body swings on a limiting slide rail with three slide rail grooves.
[0013] This utility model has the following beneficial effects:
[0014] 1. In this utility model, while ensuring linear stepless adjustment within a certain range, the switching interval between cams is eliminated by using a three-cam structure, avoiding seed discontinuity, improving land utilization, increasing lodging resistance, increasing yield, and increasing the applicability of the row seeder, thus achieving the effect of adapting to a variety of agronomic environments. Attached Figure Description
[0015] Figure 1 This is a perspective view of a three-cam gearbox for a strip seeder proposed in this utility model;
[0016] Figure 2 This is a schematic diagram of a partial cam structure of a three-cam gearbox for a seed drill proposed in this utility model;
[0017] Figure 3 This is a partial structural diagram of the limiting slide rail of a three-cam gearbox for a strip seeder proposed in this utility model;
[0018] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the gearbox housing of a three-cam type gearbox for a seed drill proposed in this utility model.
[0019] Legend:
[0020] 1. One-way clutch bearing; 2. Gearbox output shaft; 3. Rocker arm body; 4. Stroke rocker arm; 5. Rocker arm tension spring; 6. Gearbox input shaft; 7. Cam body; 8. Stroke roller; 9. Limit rail; 10. Gearbox housing; 11. Lower limit screw of rail; 12. Upper limit screw of rail; 13. Gearbox adjustment indicator; 14. Gearbox indicator scale. Detailed Implementation
[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0022] Reference Figures 1-3 This utility model provides an embodiment of a three-cam gearbox for a row seeder, comprising a one-way clutch bearing 1. The gearbox output shaft 2 is disposed on the inner wall of the one-way clutch bearing 1. A rocker arm body 3 is disposed on the outer wall of the gearbox output shaft 2. A stroke rocker arm 4 is disposed on the outer wall of the rocker arm body 3. A rocker arm tension spring 5 is disposed at the end of the stroke rocker arm 4. A stroke roller 8 is disposed at the front end of the stroke rocker arm 4. A cam body 7 is slidably connected to the upper surface of the stroke rocker arm 4. A gearbox input shaft 6 is disposed on the inner wall of the cam body 7. A limit rail 9 is disposed on the outer wall of the rocker arm tension spring 5. A rail groove is formed on the inner wall of the limit rail 9. The outer wall of the stroke roller 8 is slidably connected to the inner wall of the rail groove. A gearbox housing 10 is fixedly connected to the rear outer wall of the limit rail 9. The inner wall of the gearbox housing 10 is disposed on the outer wall of the gearbox output shaft 2. The inner wall of the gearbox housing 10 is set on the outer wall of the limiting slide rail 9, and the inner wall of the gearbox housing 10 is set on the outer wall of the gearbox input shaft 6; the inner wall of the gearbox housing 10 is threaded with a lower limit screw 11 and an upper limit screw 12; the outer wall of the limiting slide rail 9 is provided with a gearbox adjustment indicator 13, the outer wall of the gearbox adjustment indicator 13 is slidably connected with a gearbox indicator scale plate 14, and the rear outer wall of the gearbox indicator scale plate 14 is provided with a seed box; the one-way clutch bearing 1, the rocker arm body 3, the stroke rocker arm 4, the rocker arm tension spring 5, the cam body 7 and the stroke roller 8 form a set of stroke rocker arms, and the stroke rocker arms are arranged in three sets in a longitudinal distribution inside the gearbox housing 10; only the cam body 7 of the stroke rocker arms is arranged in a 120° arrangement, and the cam body 7 swings on the limiting slide rail 9 which has three slide rail grooves;
[0023] Specifically, the drive unit drives the gearbox input shaft 6 to rotate, causing the cam body 7 to rotate. Under the action of the cam body 7, the travel rocker arm 4 is driven to reciprocate. The travel rocker arm 4 drives the rocker arm body 3 to reciprocate, causing the one-way clutch bearing 1 to drive the gearbox output shaft 2 to rotate clockwise. The rocker arm tension spring 5 can achieve the effect of returning the travel rocker arm 4 to its original position. The travel roller 8 slides on the inner wall of the limit slide rail 9 to make the travel rocker arm 4 move more smoothly. The gearbox housing 10 serves as a carrier, and the lower limit screw 11 and the upper limit screw 12 of the slide rail achieve the effect of limiting. The limit slide rail 9 drives the gearbox adjustment indicator 13 to move, so that the gearbox indicator scale plate 14 can achieve the display effect.
[0024] Working principle: When this device is needed, the clockwise rotation of the gearbox input shaft 6 drives the cam body 7 to rotate clockwise. Under the action of the cam body 7, the stroke rocker arm 4 will oscillate back and forth within a certain angle and distance. The stroke rocker arm 4 drives the rocker arm body 3 to oscillate back and forth. Under the action of the one-way clutch bearing 1, the gearbox output shaft 2 rotates clockwise. The rocker arm tension spring 5 ensures that the stroke rocker arm 4 can quickly return to its original working position when resetting. The stroke roller 8 ensures that the stroke rocker arm 4 can reciprocate stably within the stroke range of the limit slide rail 9. Due to the use of the structure of three cam bodies 7, when the three cam bodies 7 reach the alternating position, The three stroke levers 4 can move alternately, overlapping their alternating positions to avoid intermittent stops. When the gearbox adjustment indicator 13 is adjusted to the right, the track of the limit slide rail 9 will tilt to the right, which will lengthen the travel of the stroke levers 4, thereby accelerating the swing speed of the swing arm body 3 and increasing the seeding rate. This gearbox solves the problem that existing row seeder gearboxes, whether traditional tower wheel type, gear replacement type or the more advanced double cam continuously variable transmission, cannot simultaneously meet the comprehensive needs of achieving linear stepless adjustment within a certain range, ensuring continuous and uniform seed sowing, improving land utilization, enhancing lodging resistance, increasing yield, and adapting to a variety of agronomic environments.
[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A three-cam gearbox for a row seeder, comprising a one-way clutch bearing (1), characterized in that: The inner wall of the one-way clutch bearing (1) is provided with a gearbox output shaft (2), the outer wall of the gearbox output shaft (2) is provided with a rocker arm body (3), the outer wall of the rocker arm body (3) is provided with a stroke rocker arm (4), the end of the stroke rocker arm (4) is provided with a rocker arm tension spring (5), the front end of the stroke rocker arm (4) is provided with a stroke roller (8), the upper surface of the stroke rocker arm (4) is slidably connected to a cam body (7), the inner wall of the cam body (7) is provided with a gearbox input shaft (6), the outer wall of the rocker arm tension spring (5) is provided with a limit slide rail (9), the inner wall of the limit slide rail (9) is provided with a slide rail groove, and the outer wall of the stroke roller (8) is slidably connected to the inner wall of the slide rail groove.
2. The three-cam gearbox for a row seeder according to claim 1, characterized in that: The rear outer wall of the limiting slide rail (9) is fixedly connected to the gearbox housing (10). The inner wall of the gearbox housing (10) is set on the outer wall of the gearbox output shaft (2). The inner wall of the gearbox housing (10) is set on the outer wall of the limiting slide rail (9). The inner wall of the gearbox housing (10) is set on the outer wall of the gearbox input shaft (6).
3. The three-cam gearbox for a row seeder according to claim 2, characterized in that: The inner wall of the gearbox housing (10) is threaded with a slide rail lower limit screw (11), and the inner wall of the gearbox housing (10) is threaded with a slide rail upper limit screw (12).
4. The three-cam gearbox for a row seeder according to claim 3, characterized in that: The outer wall of the limiting slide rail (9) is provided with a gearbox adjustment indicator (13), and the outer wall of the gearbox adjustment indicator (13) is slidably connected with a gearbox indicator scale plate (14). The rear outer wall of the gearbox indicator scale plate (14) is provided with a seed box.
5. A three-cam gearbox for a row seeder according to claim 1, characterized in that: The one-way clutch bearing (1), the rocker arm body (3), the stroke rocker arm (4), the rocker arm tension spring (5), the cam body (7) and the stroke roller (8) form a set of stroke rocker arms. The stroke rocker arms are arranged in three sets in a longitudinal distribution inside the gearbox housing (10).
6. A three-cam gearbox for a row seeder according to claim 5, characterized in that: The travel swing arm has only the cam body (7) arranged in a 120° configuration, and the cam body (7) swings on the limiting slide rail (9) which has three slide rail grooves.