阅读说明：本技术 具有过载保护的翻转犁及其过载保护方法 (Turnover plow with overload protection and overload protection method thereof ) 是由 马海龙 常亚南 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种具有过载保护的翻转犁及其过载保护方法,解决了现有技术中液压翻转犁过载时犁体与犁梁易损坏的问题。本发明包括固定架和安装架,安装架与固定架铰接,安装架上设有大梁和副梁,大梁上设有大犁体,副梁上设有副犁体,安装架上设有过载保护机构,过载保护机构与固定架相连接。本发明通过过载保护机构能在翻转犁遇到障碍物或犁体收到阻力过大时可自动抬起犁体等部件,避免了犁具和拖拉机的损坏；而且蓄能器和油缸内充入液压油的压力可方便进行调整,因此配置这种过载保护装置的翻转犁可以根据不同的土壤阻力调整压力,适用范围广。(The invention discloses a turnover plow with overload protection and an overload protection method thereof, which solve the problem that a plow body and a plow beam are easy to damage when a hydraulic turnover plow in the prior art is overloaded. The invention comprises a fixed frame and a mounting frame, wherein the mounting frame is hinged with the fixed frame, a girder and an auxiliary beam are arranged on the mounting frame, a large plough body is arranged on the girder, an auxiliary plough body is arranged on the auxiliary beam, an overload protection mechanism is arranged on the mounting frame, and the overload protection mechanism is connected with the fixed frame. The invention can automatically lift the plough body and other parts when the turnover plough meets an obstacle or the plough body receives too large resistance through the overload protection mechanism, thereby avoiding the damage of the plough tool and the tractor; and the pressure of the accumulator and the hydraulic oil filled in the oil cylinder can be conveniently adjusted, so that the turnover plow provided with the overload protection device can adjust the pressure according to different soil resistances, and the application range is wide.)

1. A reversible plow with overload protection is characterized in that: the large plough body type agricultural tractor is characterized by comprising a fixing frame (4) and a mounting frame (7), wherein the mounting frame (7) is hinged to the fixing frame (4), a girder (10) and an auxiliary beam (11) are arranged on the mounting frame (7), a large plough body (1) is arranged on the girder (10), an auxiliary plough body (2) is arranged on the auxiliary beam (11), an overload protection mechanism is arranged on the mounting frame (7), and the overload protection mechanism is connected with the fixing frame (4).

2. The reversible plow with overload protection as defined in claim 1 wherein: the mounting frame (7) is a hollow beam body, the overload protection mechanism comprises an energy accumulator (9) and a hydraulic oil cylinder (3) which are mounted at the tail of the hollow beam body, the energy accumulator (9) is connected with a cylinder body of the hydraulic oil cylinder (3) through a high-pressure oil pipe (12), a link mechanism is arranged inside the hollow beam body, one end of the link mechanism is connected with the telescopic end of the hydraulic oil cylinder (3), and the other end of the link mechanism is hinged with the fixing frame (4).

3. The reversible plow with overload protection as defined in claim 2 wherein: the connecting rod mechanism comprises a connecting rod (8) and a connecting block (13), the telescopic end of the hydraulic oil cylinder (3) is connected with the connecting rod (8) through the connecting block (13), one end of the connecting rod (8) is hinged to the connecting block (13), and the other end of the connecting rod is hinged to the fixing frame (4) through a first pin shaft (5).

4. The reversible plow with overload protection as defined in claim 3 wherein: the connecting block (13) can move in the mounting rack (7) under the action of the hydraulic oil cylinder (3) and the connecting rod (8), and the central axis of the hydraulic oil cylinder (3) is overlapped with the central axis of the connecting rod (8).

5. The turnover plow with overload protection as claimed in claim 1 ~ 4, wherein the mounting bracket (7) is fixedly provided with a connecting seat (14) at the front end thereof, the connecting seat (14) is provided with a ball screw (6), the screw end of the ball screw (6) is in threaded connection with the connecting seat (14), and the ball end of the ball screw (6) is matched with the spherical groove (15) on the fixing frame (4).

6. The reversible plow with overload protection as defined in claim 5 wherein: the fixing frame (4) is provided with a connecting lug seat (16), and the connecting lug seat (16) is hinged with a connecting rod (8) of the overload protection mechanism.

7. An overload protection method for a reversible plow having overload protection as claimed in claim 2, 3 or 6, characterized in that: the method comprises the following steps:

s1: high-purity nitrogen with certain pressure is pre-filled into the energy accumulator leather bag, and the inflation pressure is lower than the working pressure of the hydraulic oil cylinder;

s2: before turning plow cultivation, firstly filling hydraulic oil with certain pressure into the energy accumulator and the hydraulic oil cylinder;

s3: in the process of turning plow cultivation, when a plow body touches an obstacle, the whole mounting frame rotates and lifts up around the first pin shaft and the ball head screw due to increased resistance, at the moment, the extension of the hydraulic cylinder is increased under the pulling of the connecting rod, so that hydraulic oil in the hydraulic cylinder flows to the energy accumulator, a leather bag in the energy accumulator is extruded, and the internal pressure of the energy accumulator is increased;

s4: after the mounting frame is lifted to cross the obstacle, hydraulic oil in the energy accumulator flows back to the hydraulic oil cylinder again under the action of pressure, so that the extension of the hydraulic oil cylinder is reduced, the hydraulic oil cylinder pulls the connecting rod, the mounting frame is finally returned to the horizontal position, the farming depth is normal, and the pressure in the system reaches the original pressure.

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a turnover plow with overload protection and an overload protection method thereof.

Background

The hydraulic turnover plow is a tillage method for loosening soil by turning over the soil with a plow body, and the tillage depth can reach more than 40 cm. In the process of plowing, the plow body can touch obstacles such as stones or tree roots in soil, the plow body and the plow beam are fastened and connected through bolts in a rigid connection state, the bolts can be broken when the plow body meets large obstacles, and machines and tools can be deformed or a tractor can be damaged when the plow body meets large obstacles. The rigid connection also causes loosening and breakage of the connecting bolts at the joints after long-term cultivation, and the replacement of the bolts takes a long time, thereby reducing the working efficiency.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the turnover plow with the overload protection and the overload protection method thereof, and solves the problem that a plow body and a plow beam are easy to damage when the hydraulic turnover plow is overloaded in the prior art.

The technical scheme of the invention is realized as follows: the utility model provides a turnover plow with overload protection, includes mount and mounting bracket, and the mounting bracket is articulated with the mount, is equipped with girder and auxiliary girder on the mounting bracket, is equipped with the big plough body on the girder, is equipped with the auxiliary plough body on the auxiliary girder, is equipped with overload protection mechanism on the mounting bracket, and overload protection mechanism is connected with the mount.

The mounting bracket is a hollow beam body, the overload protection mechanism comprises an energy accumulator and a hydraulic oil cylinder which are mounted at the tail part of the hollow beam body, the energy accumulator is connected with a barrel body of the hydraulic oil cylinder through a high-pressure oil pipe, a link mechanism is arranged in the hollow beam body, one end of the link mechanism is connected with the telescopic end of the hydraulic oil cylinder, and the other end of the link mechanism is hinged with the fixing bracket.

The connecting rod mechanism comprises a connecting rod and a connecting block, the telescopic end of the hydraulic oil cylinder is connected with the connecting rod through the connecting block, one end of the connecting rod is hinged with the connecting block, and the other end of the connecting rod is hinged with the fixing frame through a first pin shaft.

The connecting block can move in the mounting rack under the action of the hydraulic oil cylinder and the connecting rod, and the central axis of the hydraulic oil cylinder is overlapped with the central axis of the connecting rod.

The front end of mounting bracket is fixed with the connecting seat, is equipped with the bulb screw on the connecting seat, and the screw rod end and the connecting seat threaded connection of bulb screw, the bulb end of bulb screw and the spherical recess on the mount cooperate.

The fixing frame is provided with a connecting lug seat which is hinged with a connecting rod of the overload protection mechanism.

An overload protection method for a reversible plow with overload protection, comprising the steps of:

s1: high-purity nitrogen with certain pressure is pre-filled into the energy accumulator leather bag, and the inflation pressure is lower than the working pressure of the hydraulic oil cylinder;

s2: before turning plow cultivation, firstly filling hydraulic oil with certain pressure into the energy accumulator and the hydraulic oil cylinder;

s3: in the process of turning plow cultivation, when a plow body touches an obstacle, the whole mounting frame rotates and lifts up around the first pin shaft and the ball head screw due to increased resistance, at the moment, the extension of the hydraulic cylinder is increased under the pulling of the connecting rod, so that hydraulic oil in the hydraulic cylinder flows to the energy accumulator, a leather bag in the energy accumulator is extruded, and the internal pressure of the energy accumulator is increased;

s4: after the mounting frame is lifted to cross the obstacle, hydraulic oil in the energy accumulator flows back to the hydraulic oil cylinder again under the action of pressure, so that the extension of the hydraulic oil cylinder is reduced, the hydraulic oil cylinder pulls the connecting rod, the mounting frame is finally returned to the horizontal position, the farming depth is normal, and the pressure in the system reaches the original pressure.

The invention can automatically lift the plough body and other parts when the turnover plough meets an obstacle or the plough body receives too large resistance through the overload protection mechanism, thereby avoiding the damage of the plough tool and the tractor; and the pressure of the accumulator and the hydraulic oil filled in the oil cylinder can be conveniently adjusted, so that the turnover plow provided with the overload protection device can adjust the pressure according to different soil resistances, and the application range is wide. In addition, because the turnover plow can be automatically lifted after encountering an obstacle, the resistance is reduced, the plow and the tractor can be effectively protected, the machine halt maintenance and the accessory replacement in the farming process are avoided, the working efficiency is greatly improved, the market demand is met, and the turnover plow has higher popularization value.

Drawings

In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.

Fig. 1 is a schematic view of the present invention in a normal farming state.

Fig. 2 is a schematic diagram of the state of the invention when encountering an obstacle.

Fig. 3 is a schematic view of the internal structure of the mount of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1, embodiment 1 is a turnover plow with overload protection, which comprises a fixed frame 4 and a mounting frame 7, wherein the mounting frame 7 is hinged with the fixed frame 4, relative rotation and swinging can occur between the fixed frame 7 and the fixed frame 4, and the fixed frame 4 is connected with a tractor connecting piece. A girder 10 and an auxiliary girder 11 are fixedly arranged on the mounting frame 7, a large plough body 1 is arranged on the girder 10, an auxiliary plough body 2 is arranged on the auxiliary girder 11, and an overload protection mechanism is arranged on the mounting frame 7 and is connected with the mounting frame 4. Namely, an overload protection mechanism is arranged between the mounting frame and the fixing frame, the rigid connection relation between the fixing frame and the mounting frame is changed, and overload protection is carried out according to different pressures.

Further, as shown in fig. 2, the mounting frame 7 is a hollow beam body, the overload protection mechanism comprises an energy accumulator 9 and a hydraulic oil cylinder 3 which are mounted at the tail of the hollow beam body, and a certain amount of high-purity nitrogen is filled in a leather bag of the energy accumulator. The energy accumulator 9 is connected with an upper cavity of the cylinder body of the hydraulic oil cylinder 3 through a high-pressure oil pipe 12 and is used for realizing the circulation of hydraulic oil between the energy accumulator and the upper cavity and realizing pressure regulation. The hollow beam body is internally provided with a link mechanism, one end of the link mechanism is connected with the telescopic end of the hydraulic oil cylinder 3, and the other end of the link mechanism is hinged with the fixed frame 4. The link mechanism is hinged with the fixed frame, when encountering an obstacle, the resistance is increased, and the link mechanism pulls the hydraulic oil cylinder to extend out; after the tractor crosses an obstacle, under the action of the energy accumulator, the hydraulic oil cylinder is recovered, the link mechanism is pulled to reset, non-rigid follow-up connection is realized, uneven resistance caused by overload is effectively eliminated, and overload damage to the plowshare and the tractor is avoided.

Further, link mechanism includes connecting rod 8 and connecting block 13, and hydraulic cylinder 3's flexible end passes through connecting block 13 and is connected with connecting rod 8, and the connecting block can move at mounting bracket (in the hollow beam body). One end of the connecting rod 8 is hinged with the connecting block 13, and the other end is hinged with the fixed frame 4 through the first pin shaft 5. Normal state, connecting rod are in the horizontality, and when meetting the barrier, the mounting bracket upwards lifts, and the connecting rod rotates around first round pin axle, upwards swings. The connecting block 13 can move in the mounting rack 7 under the action of the hydraulic oil cylinder 3 and the connecting rod 8, a sliding rail can also be arranged in the mounting rack, and the connecting block slides on the sliding rail. The central axis of the hydraulic oil cylinder 3 is coincident with the central axis of the connecting rod 8, so that the force can be stably transmitted.

Further, as shown in fig. 3, a connecting seat 14 is fixedly arranged at the front end of the mounting frame 7, a ball screw 6 is arranged on the connecting seat 14, a screw end of the ball screw 6 is in threaded connection with the connecting seat 14, and a ball end of the ball screw 6 is matched with a spherical groove 15 on the mounting frame 4 and can rotate in the spherical groove. The fixed frame 4 is provided with a connecting lug seat 16, and the connecting lug seat 16 is hinged with the connecting rod 8 of the overload protection mechanism through a first pin shaft. When the mounting rack swings up and down, the connecting rod swings up and down around the first pin shaft.