Anti-winding structure for cleaning rotary cultivator blades
By employing a multi-blade collaborative anti-grass-entanglement structure, and utilizing a cam groove to guide the push rod movement and saw blade cutting, the problem of grass entanglement on the rotary tiller's blade shaft is solved, achieving all-around cleaning and high-efficiency energy consumption reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN SHENGNAN AGRI DEV CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-23
AI Technical Summary
Existing rotary tillers' blade shafts are prone to getting tangled in weeds, leading to decreased tillage efficiency and increased energy consumption. Furthermore, existing anti-weed-tangling devices have many blind spots, poor coordination, and high energy consumption.
The anti-grass-tangling structure employs a multi-blade collaborative operation, including a mounting bracket, main shaft, main ring, housing, cam, push rod, spring, blade head, saw blade, and blade. The push rod is guided to move via a cam groove, and combined with saw blade cutting and blade pushing, it achieves all-round cleaning.
It effectively removes tangled grass from different parts of the rotary tiller's blades, improving cleaning efficiency, reducing energy consumption, and preventing the failure of a single component from affecting the overall cleaning effect.
Smart Images
Figure CN224386153U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of agricultural machinery technology, specifically to an anti-grass-tangling structure for cleaning rotary tiller blades. Background Technology
[0002] Rotary tillers, as core equipment in agricultural cultivation, are prone to weed entanglement on their blade shafts during operation, leading to decreased tillage efficiency, increased energy consumption, and even damage to transmission components. Current technologies primarily employ fixed cutting structures or single mobile cleaning mechanisms to prevent weed entanglement.
[0003] The closest prior art (patent number CN202220951604.4) discloses an anti-weed-entanglement device for a rotary tiller's cutter shaft. This device uses a tubular motor to drive the cutting blades to rotate, and the meshing of the tooth grooves causes the blades to move along the sliding groove of the main shaft, thus cutting entangled weeds. However, this solution has the following drawbacks: Limited cutting range: The opening angle of the cutting blades is fixed, making it unable to adapt to different weed-entanglement situations at different positions on the cutter shaft, resulting in cleaning dead zones (such as the gap between the blade root and the outer casing). Insufficient coordination: Multiple cutting components work independently, lacking a synchronized movement mechanism, resulting in low cleaning efficiency and high energy consumption. Risk of secondary entanglement: Relying solely on the cutting function without integrating a weed-pushing mechanism, cut weed residue is easily re-entangled.
[0004] Therefore, there is a need for an anti-grass-tangling structure that can efficiently and synchronously clean the rotary tiller blades. Summary of the Invention
[0005] To address the aforementioned technical problems, this application provides a rotary tiller anti-weed entanglement structure with an adjustable cleaning range, multi-blade collaborative operation, and both cutting and pushing functions, in order to solve the problems of existing devices having many cleaning dead spots, poor coordination, and inconvenient maintenance.
[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a structure for cleaning rotary tiller blades and preventing grass entanglement, including a mounting frame, on which a protective plate and a protective cover are fixedly mounted. A main shaft, a main ring, and a housing are rotatably mounted on the mounting frame. Multiple cams are fixedly mounted on the main ring. Multiple push rods are slidably mounted on the housing. The end of the push rod near the cam slides on the groove of the cam. A blade head and a saw blade are fixedly mounted on the push rod. A spring is sleeved on the push rod. The end of the spring near the cam is fixedly connected to the push rod. The end of the spring away from the cam is in close contact with the inner wall of the housing through the elastic force of the spring. A hole is provided on the push rod, and a long connecting rod is provided in the hole. Multiple blades are provided on the long connecting rod, and the end of the blade away from the cam slides on the groove of the housing.
[0007] Preferably, the main ring is provided with 5 cams, and each cam is provided with three sets of cutters. Each set of cutters includes a push rod, a spring, a cutter head and a saw blade. Each set of cutter assemblies has a blade fixedly connected to one end on both sides.
[0008] Preferably, a limit rod is rotatably provided on the main ring, and a sliding groove is provided on the limit rod. The direction of the sliding groove is the same as the direction of movement of the long connecting rod, and the long connecting rod is slidably disposed on the sliding groove of the limit rod.
[0009] Preferably, the protective cover is fixedly provided with a mounting rod, the mounting rod is provided with three side shafts, each side shaft is fixedly provided with an external gear and an internal gear, the main shaft is fixedly provided with a main gear, the main gear meshes with the three external gears, and the outer shell is fixedly provided with a gear ring, the gear ring meshes with the three internal gears.
[0010] Preferably, a side plate is fixedly provided on the main gear, and a convex ring is provided on the side plate, which is rotatably mounted on the mounting bracket.
[0011] The technical solution provided in this application has the following advantages compared with the prior art:
[0012] 1. This application guides the push rod to move through the protrusion of the cam, so that the cutter head is away from the main shaft. While pulling the weeds, the saw blade cuts the weeds wrapped around the inner end of the cutter head. The blade extends out of the outer shell to push and cut the weeds wrapped around both sides of the cutter head, realizing all-round cleaning of weeds wrapped around different positions of the cutter head. It overcomes the defect that the angle of the fixed cutting blade is not adjustable, and covers areas that are prone to weed wrapping, such as the root of the cutter head and the gap between the outer shell.
[0013] 2. The cam's groove cooperates with the main ring's slider, making the cam stable relative to the main ring and easy to install. The protrusion on the cam can guide the push rod to slide on the outer shell, driving the blade head, saw blade, and other components to move flexibly. It can flexibly adjust the cleaning action according to the actual situation of grass entanglement, overcoming the shortcomings of poor flexibility of existing cleaning devices.
[0014] 3. The long connecting rod is connected to multiple push rods, enabling the push rods to move synchronously and preventing a single push rod from malfunctioning and affecting the cleaning effect. At the same time, the limit rod restricts the movement of the long connecting rod, ensuring stable operation of the device. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this application;
[0016] Figure 2 This is a cross-sectional view of the protective plate of this application;
[0017] Figure 3 This is a cross-sectional view of the protective cover of this application;
[0018] Figure 4 This is a cross-sectional view of the main ring of this application;
[0019] Figure 5 for Figure 4Enlarged view of the local structure at point A;
[0020] Figure 6 This is a schematic diagram of the cutter head of this application;
[0021] Figure 7 for Figure 6 Enlarged view of the local structure at point B;
[0022] Figure 8 This is a schematic diagram of the tool assembly of this application;
[0023] Figure 9 for Figure 8 Enlarged view of the local structure at point C;
[0024] Figure 10 for Figure 8 Enlarged view of the local structure at point D.
[0025] In the diagram: 101-Mounting bracket; 102-Protective plate; 103-Protective cover; 104-Spindle; 105-Main ring; 106-Cam; 107-Push rod; 108-Spring; 109-Cutter head; 110-Saw blade; 111-Long connecting rod; 112-Blade; 113-Limit rod; 114-Gear ring; 115-Mounting rod; 116-Side shaft; 117-External gear; 118-Internal gear; 119-Side plate; 120-Housing shell; 121-Main gear. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0028] like Figures 1 to 10As shown, the anti-weed-tangling structure for cleaning rotary tiller blades includes a mounting frame 101. A protective plate 102 and a protective cover 103 are fixedly mounted on the mounting frame 101. A main shaft 104, a main ring 105, and a housing 120 are rotatably mounted on the mounting frame 101. Multiple cams 106 are fixedly mounted on the main ring 105. Multiple push rods 107 are slidably mounted on the housing 120. The end of each push rod 107 near a cam 106 slides on a groove in the cam 106. A [missing information - likely a device or component] is fixedly mounted on each push rod 107. The blade 109 and saw blade 110 are provided. A spring 108 is sleeved on the push rod 107. The end of the spring 108 near the cam 106 is fixedly connected to the push rod 107. The end of the spring 108 away from the cam 106 is in close contact with the inner wall of the housing 120 through the elastic force of the spring 108. A hole is provided on the push rod 107, and a long connecting rod 111 is provided in the hole. Multiple blades 112 are provided on the long connecting rod 111. The end of the blade 112 away from the cam 106 slides on the slide groove of the housing 120.
[0029] This application is mounted on a rotary tiller via a mounting bracket 101, and its main shaft 104 is connected to the power source of the rotary tiller at both ends, thereby driving the cutter head 109 of this application to rotate. During operation, the weeds brought up by the cutter head 109 will become entangled on the outer casing 120 and the cutter head 109. Therefore, the cam 106 provided inside the outer casing 120 moves the cutter head 109 to a certain extent to cut and push away the weeds.
[0030] Specifically, the cam 106 is provided with two protrusions. When the inner end of the push rod 107 moves to the protrusion, the shape of the protrusion guides the push rod 107 to slide on the housing 120. The push rod 107 pushes the cutter head 109 away from the main shaft 104, thereby pulling the weeds away from the main shaft 104. During this process, the spring 108 on the push rod 107 cuts the tangled weeds through its own multiple saw blades, preventing the weeds from getting tangled at the inner end of the cutter head 109, that is, the place where the cutter head 109 and the push rod 107 contact.
[0031] When push rod 107 moves, it drives long connecting rod 111 to move away from main shaft 104 through the hole at its inner end. This allows long connecting rod 111 to cooperate with other push rods 107, ensuring that all push rods 107 on long connecting rod 111 move synchronously. This prevents any one push rod from failing to move. The movement of long connecting rod 111 is limited by limit rod 113. The movement of long connecting rod 111 also drives multiple blades 112 to move synchronously. The blades 112 extend out of housing 120 to push and cut weeds wrapped around the sides of the blade head 109, i.e., the housing 120, causing them to break and detach from housing 120.
[0032] Traditional rotary tiller blade cleaning devices often only clean weeds that are relatively visible on the blade surface. However, they are less effective at cleaning weeds deeply entangled in the connection between the blade head and the equipment, specifically at the contact point between the blade head 109 and the push rod 107. This application cleverly utilizes the protrusion of the cam 106 to guide the push rod 107. When the inner end of the push rod 107 moves to the protrusion of the cam 106, the push rod 107 pushes the blade head 109 away from the main shaft 104. This not only pulls the weeds away from the vicinity of the main shaft 104, but also allows the saw blade 110 on the push rod 107 to cut the weeds entangled in this area, effectively solving the problem of weed entanglement in areas that are difficult to reach with traditional cleaning methods. Furthermore, the blade 112 extends from the outer casing 120 to push and cut the weeds entangled on both sides of the blade head 109, achieving comprehensive and deep cleaning of weeds entangled in different locations on the blade head 109, effectively overcoming the problem of incomplete cleaning in existing technologies.
[0033] like Figures 3 to 8 As shown, the main ring 105 is provided with 5 cams 106, and each cam 106 is provided with three sets of cutters. Each set of cutters includes a push rod 107, a spring 108, a cutter head 109 and a saw blade 110. Each set of cutter assemblies has a blade 112 fixedly connected to one end on both sides.
[0034] Specifically, on the same horizontal plane, one cam 106 corresponds to three sets of tool assemblies. In the space between the five cams 106, each space holds three blades 112, corresponding to the cutter head 109 and moving with it. The cam 106 has a sliding groove, and the main ring 105 has a slider. The cooperation of the slider and the sliding groove facilitates the installation of the cam 106 and restricts its movement, keeping the cam 106 relatively fixed to the main ring 105 to prevent wobbling.
[0035] like Figures 4 to 10 As shown, a limiting rod 113 is rotatably provided on the main ring 105. A sliding groove is provided on the limiting rod 113. The direction of the sliding groove is the same as the moving direction of the long connecting rod 111. The long connecting rod 111 is slidably disposed on the sliding groove of the limiting rod 113.
[0036] Specifically, each end of the main ring 105 is provided with three limiting rods 113. The three limiting rods 113 are fixedly installed on the inner wall of the outer shell 120, and the end closest to the main ring 105 is rotatably connected to the main ring 105.
[0037] In some traditional cleaning devices, a malfunction in a single cleaning component can severely impact the entire cleaning process. This application addresses this issue by using a long connecting rod 111 connected to multiple push rods 107. This design allows the push rods 107 to move synchronously, ensuring that even if one push rod 107 malfunctions, the others can continue operating, minimizing disruption to the cleaning process. Simultaneously, a limiting rod 113 precisely restricts the movement of the long connecting rod 111, preventing deviation or excessive movement. This ensures stable operation of the entire device even in complex working environments, effectively preventing a decrease in cleaning effectiveness due to component failure or displacement.
[0038] like Figures 6 to 10 As shown, a mounting rod 115 is fixedly installed on the protective cover 103, and three side shafts 116 are installed on the mounting rod 115. Each side shaft 116 is fixedly installed with an external gear 117 and an internal gear 118. A main gear 121 is fixedly installed on the main shaft 104, and the main gear 121 meshes with the three external gears 117. A gear ring 114 is fixedly installed on the outer shell 120, and the gear ring 114 meshes with the three internal gears 118.
[0039] Specifically, an external power source drives the main shaft 104 to rotate on the mounting bracket 101. The mounting bracket 101 drives the main gear 121, which in turn drives the three external gears 117 to rotate simultaneously through meshing with them. In turn, the external gears 117 drive the side shaft 116 and the internal gear 118 to rotate synchronously. The internal gear 118 meshes with the gear ring 114, thereby driving the gear ring 114 to rotate on the protective cover 103 and the mounting bracket 101. This, in turn, drives the outer casing 120 to rotate on the mounting bracket 101 and the protective cover 103. The outer casing 120 drives the push rod 107, which drives multiple blade assemblies, to slide on the cam 106. This causes the spring 108 and the blade 112 to cut and remove weeds through the protrusion of the cam 106, thus achieving cleaning.
[0040] like Figures 4 to 7 As shown, a side plate 119 is fixedly mounted on the main gear 121, and a convex ring is provided on the side plate 119. The convex ring is rotatably mounted on the mounting bracket 101.
[0041] Specifically, the outer shell 120 is supported by the side plate 119. When the outer shell 120 is rotated, the support of the outer shell 120 is achieved by the rotation of the side plate 119 on the mounting bracket 101.
[0042] Existing cleaning devices are mostly fixed structures, unable to flexibly adjust to the complex and ever-changing weed entanglement situations in actual operations. In this application, however, the sliding groove of the cam 106 closely engages with the slider of the main ring 105, ensuring stable installation of the cam 106 relative to the main ring 105 and preventing wobbling during operation that could affect the cleaning effect. Furthermore, the carefully designed protrusion on the cam 106 precisely guides the push rod 107 to slide flexibly on the housing 120 according to different weed entanglement conditions, thereby driving the blade head 109, saw blade 110, and blade 112 to make corresponding positional and movement adjustments. This flexible and adaptive cleaning mechanism effectively copes with various complex weed entanglement scenarios, significantly improving cleaning efficiency and successfully overcoming the shortcomings of poor flexibility in existing cleaning devices.
[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A grass entanglement preventing structure for cleaning a rotary cultivator blade, characterized by: The system includes a mounting bracket (101), on which a protective plate (102) and a protective cover (103) are fixedly mounted. A main shaft (104), a main ring (105), and a housing (120) are rotatably mounted on the mounting bracket (101). Multiple cams (106) are fixedly mounted on the main ring (105), and multiple push rods (107) are slidably mounted on the housing (120). One end of each push rod (107) near a cam (106) slides on a groove in the cam (106). A cutter head (109) and a saw blade are fixedly mounted on each push rod (107). 110), a spring (108) is sleeved on the push rod (107). The end of the spring (108) near the cam (106) is fixedly connected to the push rod (107). The end of the spring (108) away from the cam (106) is in close contact with the inner wall of the housing (120) through the elastic force of the spring (108). A hole is provided on the push rod (107), and a long connecting rod (111) is provided on the hole. Multiple blades (112) are provided on the long connecting rod (111). The end of the blade (112) away from the cam (106) slides on the groove of the housing (120).
2. The anti-grass-tangling structure for cleaning rotary tiller blades according to claim 1, characterized in that: The main ring (105) is provided with five cams (106), and each cam (106) is provided with three sets of cutters. Each set of cutters includes a push rod (107), a spring (108), a cutter head (109) and a saw blade (110). Each set of cutter assemblies is fixedly connected to one end of a blade (112) on both sides.
3. The anti-grass-tangling structure for cleaning rotary tiller blades according to claim 2, characterized in that: A limiting rod (113) is rotatably provided on the main ring (105). A groove is provided on the limiting rod (113). The direction of the groove is the same as the moving direction of the long connecting rod (111). The long connecting rod (111) is slidably disposed on the groove of the limiting rod (113).
4. The anti-weed-tangling structure for cleaning rotary tiller blades according to claim 3, characterized in that: The protective cover (103) is fixedly provided with a mounting rod (115), and the mounting rod (115) is provided with three side shafts (116). Each side shaft (116) is fixedly provided with an external gear (117) and an internal gear (118). The main shaft (104) is fixedly provided with a main gear (121), which meshes with the three external gears (117). The outer shell (120) is fixedly provided with a gear ring (114), which meshes with the three internal gears (118).
5. The anti-weed-tangling structure for cleaning rotary tiller blades according to claim 4, characterized in that: A side plate (119) is fixedly installed on the main gear (121), and a convex ring is provided on the side plate (119). The convex ring is rotatably mounted on the mounting bracket (101).