A structure for preventing agricultural machinery from bypassing grass

Abstract

The utility model discloses an anti-grass-bypass structure for agricultural machinery, a first grass-blocking portion protruding outward is arranged on a transmission surface of a transmission portion extending outward from a rotating shaft, and a second grass-blocking portion is also arranged at an end portion of a shaft rod, in the axial direction of the shaft rod, a free end of the first grass-blocking portion and a corresponding end portion of the shaft rod are staggered with each other, and the second grass-blocking portion is staggered with the first grass-blocking portion; the first grass-blocking portion can prevent grass vines from directly falling off and being entangled on the end portion of the shaft rod, and the second grass-blocking portion not only plays the same grass-blocking effect as the first grass-blocking portion, but also makes the path of the rolled-up grass vines avoiding the first grass-blocking portion and the second grass-blocking portion to fall to the end portion of the shaft rod more complicated; the anti-grass-bypass structure for agricultural machinery described in the utility model is not only suitable for rotary tillers with middle transmission and side transmission, the anti-grass-bypass structure can also be used on other agricultural machinery with similar working structures to rotary tillers, such as grass choppers, weeders, micro-tillage machines and other agricultural machinery, and has good practicality.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery, and in particular relates to a grass-preventing structure for agricultural machinery. Background Art

[0002] In modern agricultural production, rotary tillers are often used instead of manual tillage. The rotary tillers mainly include a traveling part and a knife holder connected to the rear of the traveling part. A tilling knife is rotatably connected under the knife holder. The power system on the traveling part is connected to the tilling knife transmission. While the traveling part drives the knife holder forward, it drives the tilling knife to rotate through the power system, thereby completing the tillage of the land while moving. At present, there are two main transmission connection forms between the power system and the tiller blade. One is side transmission, in which the power system transmits power to both sides of the blade holder through a laterally arranged transmission shaft, and both ends of the blade holder extend downward and protrude inwardly, respectively, and are provided with protruding rotating shafts, and the two rotating shafts are synchronously rotated and connected with an integral tiller blade in the middle, such as a transmission mechanism and a rotary tiller with a rotation function disclosed in Chinese patent CN220342764U; the other is middle transmission, in which a transmission box is arranged in the middle of the blade holder, the input end of the transmission box is located above the blade holder and is connected to the power system chain transmission, the output end of the transmission box is located below the blade holder and has protruding rotating shafts on both sides, the tiller blade is divided into two sections and are synchronously rotated and connected with the rotating shafts on both sides of the transmission box, such as a central transmission middle low-resistance vertical cutting double-shaft double-layer cutting rotary tiller disclosed in Chinese patent CN105850239B.

[0003] Since the tilling knife is connected to the rotating shaft through a hollow shaft and rotates synchronously with it, there is a gap between the end face of the shaft and the knife holder or transmission box. The grass vines rolled up by the tilling knife are not only easy to entangle on the shaft, but also easy to fall into the gap and enter the assembly gap between the rotating shaft and the knife holder or transmission box along the gap! This will further damage the bearings, oil seal structure, and even the interior of the transmission box between the rotating shaft and the tool holder or transmission box, affecting the operation of the rotating shaft, and will also cause an increase in the load on the rotating shaft, affecting the stability of the transmission between the rotating shaft and the shaft rod; to this end, the applicant tried to add a shaft end cover between the shaft rod, the tool holder and the transmission box, the shaft end cover and the transmission box are sealed and fixedly connected, the rotating shaft passes through the shaft end cover and is connected to the shaft rod, an annular groove is provided on the end face of the shaft end cover facing the shaft rod, and a flange matching the groove is provided on the end face of the shaft rod. The two cooperate to make the path of the gap between the end face of the shaft rod and the tool holder or transmission box become tortuous. After trial use, it was found that although the tortuous gap path can reduce the possibility of grass vines entering the interior through the gap, the gap is still in a completely exposed state in the radial direction of the shaft rod, and the grass vines rolled up by the plowing knife may still fall into the gap, which needs further improvement and optimization. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a structure for preventing weeds from winding around agricultural machinery, so as to solve the technical problem that weeds entangled on the tilling blade can easily enter the gap between the end of the tilling blade and the transmission part that drives it to rotate, thereby affecting the operation of the rotating shaft, thereby achieving the effect of improving the operating stability of the rotary tiller.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A structure for preventing weeds from winding around an agricultural machine comprises a tilling blade and a transmission part, wherein the tilling blade comprises a hollow shaft, the surface of the transmission part opposite to the end of the shaft being a transmission surface, the transmission part comprising a rotating shaft which rotates and passes through its transmission surface, the free end of the rotating shaft extends into the shaft and is synchronously rotatably connected, the transmission surface comprises a raised first grass-blocking part, the free end of the first grass-blocking part extends toward the tilling blade along the axial direction of the shaft, the distance between the free end of the first grass-blocking part and the transmission surface is greater than the distance between the end of the shaft and the transmission surface, and the first grass-blocking part is located on the outside of the shaft and is arranged close to the shaft to prevent weeds from winding around the rotating shaft.

[0007] Furthermore, both ends of the blade holder of the rotary tiller extend downward to form the transmission part, the tilling blade is located between the two transmission parts, and the inner side surfaces of the two transmission parts form the transmission surface.

[0008] Furthermore, a transmission box is provided in the middle of the blade holder of the rotary tiller, and the output end of the transmission box extends to the bottom of the blade holder to form the transmission part, and the two side surfaces of the transmission part respectively form the transmission surfaces, and there are two tilling blades which are respectively located on both sides of the transmission part and are correspondingly connected.

[0009] Furthermore, there are a plurality of first grass blocking portions which are circumferentially spaced and distributed outside the shaft.

[0010] Furthermore, there are three first grass guard parts which are distributed in a herringbone shape.

[0011] Furthermore, the first grass stopper is a component independent of the transmission part, is L-shaped and includes two plate segments perpendicular to each other, one plate segment is abutted against the transmission surface and fixed by bolts, and the other plate segment forms the free end of the first grass stopper.

[0012] Furthermore, a circle of radially protruding second grass stop portion is provided on the outer circumferential surface of the shaft rod, the free end of the second grass stop portion is bent and extends toward the transmission surface, the free end surface of the second grass stop portion exceeds the corresponding end surface of the shaft rod, and the free end surface of the second grass stop portion forms the end of the shaft rod; the first grass stop portion is located outside the second grass stop portion.

[0013] Furthermore, the second grass retaining part is a component independent of the shaft rod, the second grass retaining part is bowl-shaped, the mouth of the bowl faces the transmission surface, the bottom of the bowl has a through hole, the shaft rod passes through the through hole and is sealed and fixedly connected to the second grass retaining part.

[0014] Furthermore, a shaft end cover is provided between the transmission surface and the shaft rod, and the shaft end cover is sealed and fixed on the transmission surface. The rotating shaft passes through the shaft hole of the shaft end cover and extends into the shaft rod. An annular groove coaxial with the shaft hole is provided on the end surface of the shaft end cover facing the shaft rod, and an annular protrusion matching the annular groove is provided on the opposite end surface of the shaft rod. The annular protrusion is located in the annular groove and slides in fit.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. In the anti-grass-winding structure of the agricultural machinery described in the utility model, a first grass-blocking portion protruding outward is arranged on the transmission surface of the transmission portion extending out of the rotating shaft, and in the axial direction of the shaft, the free end of the first grass-blocking portion and the corresponding shaft end are staggered with each other. The first grass-blocking portion can block and cut the grass vines rolled up by the tiller and close to the shaft end, preventing the grass vines from directly falling and winding around the shaft end, thereby reducing the possibility of grass vines entering the gap between the shaft end and the transmission surface, which is beneficial to improving the stability of the operation of the rotary tiller.

[0017] 2. In the anti-grass detour structure of the agricultural machinery described in the utility model, a second grass blocking portion is further arranged at the end of the shaft rod. The second grass blocking portion blocks the gap between the end of the shaft rod and the transmission surface in the radial direction of the shaft rod, which not only exerts the same grass blocking effect as the first grass blocking portion, but also is staggered with the first grass blocking portion in the axial direction of the shaft rod, making the path of the rolled-up grass vines avoiding the first grass blocking portion and the second grass blocking portion to reach the end of the shaft rod more complicated, thereby further improving the anti-grass detour effect.

[0018] 3. The anti-grass-winding structure for agricultural machinery described in the utility model can be applied to both rotary tillers with center transmission and rotary tillers with side transmission, and can effectively prevent grass vines from falling into the gap between the tiller shaft and the transmission part, which is beneficial to improving the stability of the rotary tiller operation. It can be understood that the anti-grass-winding structure can also be used on other agricultural machinery with similar working structures to rotary tillers, such as grass shredders, weeders, micro-tillers and other agricultural machinery, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the anti-grass bypass structure for agricultural machinery described in Example 1;

[0020] Figure 2 for Figure 1 A schematic diagram of a partial cross-section at center A;

[0021] Figure 3 A schematic diagram of a partial cross-section of the anti-grass bypass structure of an agricultural machine according to Example 2;

[0022] Figure 4 A schematic diagram of the anti-grass bypass structure for agricultural machinery described in Example 3;

[0023] Among them, there are a transmission part 1, a shaft 2, a rotating shaft 3, a first grass blocking part 4, a tool holder 5, a transmission box 6, a shaft end cover 7, and a second grass blocking part 8. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0025] Embodiment 1:

[0026] See also Figure 1 , an agricultural machinery anti-grass detour structure, comprising a tilling blade and a transmission part 1, the tilling blade comprising a hollow shaft 2, the surface of the transmission part 1 opposite to the end of the shaft is a transmission surface, the transmission part 1 has a rotating shaft 3 extending out of the transmission surface, the free end of the rotating shaft 3 extends into the shaft 2 and is synchronously rotated and connected, and a raised first grass blocking part 4 is provided on the transmission surface, the free end of the first grass blocking part 4 extends along the axial direction of the shaft 2 in a direction away from the transmission surface, the distance between the free end of the first grass blocking part 4 and the transmission surface is greater than the distance between the end of the shaft and the transmission surface, the first grass blocking part 4 is located on the outside of the shaft 2 and is arranged close to the shaft 2; in this embodiment, the power system and the tilling blade of the rotary tiller adopt a middle transmission, a transmission box 6 is provided in the middle of the blade holder 5 of the rotary tiller, the output end of the transmission box 6 extends to the bottom of the blade holder 5 to form the transmission part 1, and the two side surfaces of the transmission part 1 are respectively formed as the transmission surfaces, the tilling blade is divided into two sections and are respectively located on both sides of the transmission part 1 and are correspondingly connected.

[0027] The anti-grass winding structure of the agricultural machinery described in the utility model is provided with a first grass blocking portion 4 protruding outward on the transmission surface of the transmission portion 1 extending outward from the rotating shaft 3. In the axial direction of the shaft 2, the free end of the first grass blocking portion 4 is staggered with the corresponding shaft end. The first grass blocking portion 4 can block and cut the grass vines rolled up by the tiller and close to the shaft end, preventing the grass vines from directly falling and winding around the shaft end, thereby reducing the possibility of grass vines entering the gap between the shaft end and the transmission surface, which is beneficial to improving the stability of the operation of the rotary tiller.

[0028] See also Figure 1 and Figure 2 In this embodiment, a shaft end cover 7 is provided between the transmission surface and the shaft rod 2, and the shaft end cover 7 is sealed and fixed on the transmission surface. The rotating shaft 3 passes through the shaft hole of the shaft end cover 7 and then extends into the shaft rod 2. The end surface of the shaft end cover 7 facing the shaft rod 2 is provided with an annular groove coaxial with its shaft hole, and the opposite end surface of the shaft rod 2 is provided with an annular protrusion matched with the annular groove. The annular protrusion is located in the annular groove and slides in cooperation, and can rotate relatively. In this way, not only can a bearing and an oil seal structure be provided between the shaft hole of the shaft end cover 7 and the rotating shaft 3, thereby reducing the difficulty of assembly and improving the stability of the rotation of the rotating shaft 3, but it is also beneficial to reduce the possibility of grass vines entering the transmission box 6 from the gap between the end of the shaft rod and the transmission surface.

[0029] In order to improve the grass blocking effect, a plurality of first grass blocking parts 4 should be provided and distributed outside the shaft 2 at intervals in the circumferential direction. In this embodiment, there are three first grass blocking parts 4 and they are distributed in a herringbone shape, such as Figure 1 As shown, the first grass retaining portion 4 is respectively arranged above, in front of and behind the shaft 2, and it is not suitable to arrange the first grass retaining portion 4 below the shaft 2. Firstly, it is less likely that the rolled-up grass vines will be entangled from below the shaft 2 under the action of their own gravity. Secondly, if a fixed first grass retaining portion 4 is arranged below the shaft 2, when the rotary tiller is moving, the first grass retaining portion 4 is easy to hook the grass vines or collide with the protruding stones on the cultivated land, thereby affecting the normal operation of the rotary tiller.

[0030] See also Figure 1 and Figure 2 In order to facilitate manufacturing and assembly, the first grass stopper 4 is an independent component from the transmission part 1. The first grass stopper 4 is L-shaped and includes two plate sections perpendicular to each other. One plate section is close to the transmission surface and fixed by bolts, and the other plate section forms the free end of the first grass stopper 4. During implementation, the end of the shaft end cover 7 facing the transmission box 6 passes through the flange structure and is connected to the transmission surface by bolts. The bolts for fixing the L-shaped first grass stopper 4 and the bolts for fixing the shaft end cover 7 can be shared, and the first grass stopper 4 is connected to the outer end surface of the flange structure of the shaft end cover 7.

[0031] See also Figure 1 and Figure 2 Under the premise of setting the shaft end cover 7, in order to shorten the length of the first grass stop part 4, improve the structural stability and further improve the grass stop effect, a circle of radially protruding second grass stop part 8 is designed on the outer circumferential surface of the shaft rod 2, the free end of the second grass stop part 8 is bent and extends toward the transmission surface, the free end end surface of the second grass stop part 8 exceeds the corresponding end surface of the shaft rod 2, and the free end end surface of the second grass stop part 8 is formed as the end of the shaft rod; the first grass stop part 4 is located outside the second grass stop part 8; in this way, the second grass stop part 8 blocks the gap between the shaft rod 2 and the shaft end cover 7 in the radial direction of the shaft rod 2 The first grass blocking portion 4 and the second grass blocking portion 8 are staggered in the axial direction of the shaft 2 to play the role of blocking grass, so that the first grass blocking portion 4 is not too long, and the staggering of the two makes the path of the rolled up grass vines avoiding the first grass blocking portion 4 and the second grass blocking portion 8 to fall onto the rotating shaft 3 more complicated, thereby further improving the anti-grass detour effect; when implemented, the distance between the free end of the first grass blocking portion 4 and the transmission surface should be at least greater than the distance between the end of the shaft and the transmission surface, and the free end of the first grass blocking portion 4 can also be extended as far as possible to the vicinity of the adjacent first tillage blade, so as to more effectively reduce the weeds from being entangled.

[0032] See also Figure 1 and Figure 2To facilitate manufacturing and assembly, the second grass stopper 8 is a component independent of the shaft rod 2. The second grass stopper 8 is bowl-shaped, and the mouth of the bowl faces the transmission surface. The bottom surface of the bowl has a through hole, and the shaft rod 2 passes through the through hole and is sealed and fixedly connected with the second grass stopper 8. In this way, the outer cylindrical surface of the second grass stopper 8 is tapered and the diameter of the end facing the transmission surface is larger. When grass vines fall onto the second grass stopper 8, they are more likely to slide to the side away from the transmission surface under the action of their own gravity, further preventing the grass vines from falling into the gap between the end of the shaft rod and the transmission surface.

[0033] Embodiment 2:

[0034] See also Figure 3 The difference from Example 1 is that the first grass retaining portion 4 is fixed to the shaft end cover 7 by bolts, and the bolts for fixing the first grass retaining portion 4 and the shaft end cover 7 are shared; this is conducive to reducing the number of parts of the anti-grass structure and simplifying the assembly operation.

[0035] Embodiment 3:

[0036] See also Figure 4 The difference from Example 1 is that, in this embodiment, the power system and the tilling blade of the rotary tiller adopt side transmission, and the two ends of the blade holder 5 of the rotary tiller extend downward to form the transmission part 1, the tilling blade is located between the two transmission parts 1, and the inner side surfaces of the two transmission parts 1 form the transmission surface; in this way, the agricultural machinery anti-grass bypass structure of the utility model can be applied to both rotary tillers adopting middle transmission and rotary tillers adopting side transmission, and has good practicality.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A structure for preventing agricultural machinery from bypassing grass, characterized in that: The utility model comprises a tilling blade and a transmission part, wherein the tilling blade comprises a hollow shaft, the surface of the transmission part opposite to the end of the shaft is a transmission surface, the transmission part comprises a rotating shaft which rotates and passes through its transmission surface, the free end of the rotating shaft extends into the shaft and is synchronously rotated and connected, the transmission surface comprises a raised first grass blocking part, the free end of the first grass blocking part extends toward the tilling blade along the axial direction of the shaft, the distance between the free end of the first grass blocking part and the transmission surface is greater than the distance between the end of the shaft and the transmission surface, the first grass blocking part is located on the outside of the shaft and is arranged close to the shaft to prevent weeds from being entangled on the rotating shaft.

2. The structure for preventing agricultural machinery from bypassing grass according to claim 1, characterized in that: Both ends of the blade holder of the rotary tiller extend downward to form the transmission part, the tilling blade is located between the two transmission parts, and the inner side surfaces of the two transmission parts form the transmission surface.

3. The structure for preventing agricultural machinery from bypassing grass according to claim 1, characterized in that: A transmission box is provided in the middle of the blade holder of the rotary tiller, and the output end of the transmission box extends to the bottom of the blade holder to form the transmission part, and the two side surfaces of the transmission part respectively form the transmission surfaces. There are two tilling blades which are respectively located on both sides of the transmission part and are correspondingly connected.

4. The structure for preventing agricultural machinery from bypassing grass according to claim 1, characterized in that: There are a plurality of first grass blocking parts which are circumferentially spaced and distributed outside the shaft.

5. The structure for preventing agricultural machinery from bypassing grass according to claim 4, characterized in that: There are three first grass guards distributed in a herringbone shape.

6. The structure for preventing agricultural machinery from bypassing grass according to claim 1, characterized in that: The first grass stopper is a component independent of the transmission part. The first grass stopper is L-shaped and includes two plate sections perpendicular to each other. One plate section is abutted against the transmission surface and fixed by bolts, and the other plate section forms the free end of the first grass stopper.

7. The structure for preventing agricultural machinery from bypassing grass according to claim 1, characterized in that: The outer circumferential surface of the shaft rod is provided with a circle of radially protruding second grass stop portion, the free end of the second grass stop portion is bent and extends toward the transmission surface, the free end end surface of the second grass stop portion exceeds the corresponding end surface of the shaft rod, and the free end end surface of the second grass stop portion forms the end portion of the shaft rod; the first grass stop portion is located outside the second grass stop portion.

8. The structure for preventing agricultural machinery from bypassing grass according to claim 7, characterized in that: The second grass stopper is a component independent of the shaft rod. The second grass stopper is bowl-shaped with the mouth of the bowl facing the transmission surface and the bottom of the bowl having a through hole. The shaft rod passes through the through hole and is sealed and fixedly connected with the second grass stopper.

9. The structure for preventing agricultural machinery from bypassing grass according to claim 7, characterized in that: A shaft end cover is provided between the transmission surface and the shaft rod, and the shaft end cover is sealed and fixed on the transmission surface. The rotating shaft passes through the shaft hole of the shaft end cover and extends into the shaft rod. An annular groove coaxial with the shaft hole is provided on the end surface of the shaft end cover facing the shaft rod, and an annular protrusion matching the annular groove is provided on the opposite end surface of the shaft rod. The annular protrusion is located in the annular groove and slides in fit.

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