阅读说明：本技术 一种农业机械用避让传感机构及其避让方法 (Avoidance sensing mechanism for agricultural machinery and avoidance method thereof ) 是由 王红松 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种农业机械用避让传感机构,包括主盒体、杠杆件、触碰杆、传感器、转轴和复位结构,主盒体为可开启密封盒体,主盒体通过支座板设置在旋耕器或者除草刀具的侧前方,杠杆件为L型并通过转轴铰支在主盒体底板上方,杠杆件的长臂端探出主盒体并连接触碰杆,触碰杆设置在旋耕器或者除草刀具的前方,杠杆件短臂端连接复位结构；传感器安装在主盒体底板上且探测头朝向腔室内,杠杆件的长臂端能够掠过传感器探测头。本发明农业机械用避让传感机构及其避让方法,采用电子开关作为感应元件,信号传递稳定可靠,便于集成控制,而且采用封闭式盒体结构,降低了故障率和维护成本。(The invention discloses an avoiding sensing mechanism for agricultural machinery, which comprises a main box body, a lever part, a touch rod, a sensor, a rotating shaft and a reset structure, wherein the main box body is an openable sealing box body; the sensor is installed on the main box body bottom plate and the detecting head faces the chamber, and the long arm end of the lever member can sweep over the detecting head of the sensor. The avoidance sensing mechanism for the agricultural machine and the avoidance method thereof adopt the electronic switch as the sensing element, the signal transmission is stable and reliable, the integrated control is convenient, and the failure rate and the maintenance cost are reduced by adopting the closed box body structure.)

1. The utility model provides an agricultural machine is with dodging sensing mechanism which characterized in that: the rotary cultivator comprises a main box body (1), a lever piece (2), a touch rod (3), a sensor (4), a rotating shaft (6) and a reset structure, wherein the main box body (1) is an openable sealing box body, the main box body (1) is arranged in front of the side of a rotary cultivator or a weeding cutter through a support plate (10), the lever piece (2) is L-shaped and is hinged above the bottom plate of the main box body (1) through the rotating shaft (6), the long arm end of the lever piece (2) extends out of the main box body (1) and is connected with the touch rod (3), the touch rod (3) is arranged in front of the rotary cultivator or the weeding cutter, and the short arm end of the lever piece (2) is connected with the reset structure; the sensor (4) is installed on the bottom plate of the main box body (1) and the detection head faces the cavity, and the long arm end of the lever member (2) can sweep over the detection head of the sensor (4).

2. The avoidance sensor mechanism for an agricultural machine according to claim 1, wherein: the cross section of the lever piece (2) is in a flat shape, a guide slit (104) is formed in the side wall, facing the touch rod (3), of the main box body (1), and the long arm end of the lever piece (2) swings in the guide slit (104) in a guiding mode.

3. The avoidance sensor mechanism for an agricultural machine according to claim 2, wherein: the end of the long arm end of the lever piece (2) is connected with a sleeve (201), and the root of the touch rod (3) is inserted into the sleeve (201).

4. The avoidance sensor mechanism for an agricultural machine according to claim 3, wherein: a jackscrew (8) is arranged on the outer wall of the sleeve (201), and the inner end of the jackscrew (8) tightly presses the root of the touch rod (3); the root of the touch rod (3) is provided with a milling flat table (303), and the inner end of the jackscrew (8) is tightly pressed on the milling flat table (303).

5. The avoidance sensor mechanism for an agricultural machine according to claim 3 or 4, wherein: a bending section (302) is arranged at the position, close to the sleeve (201), of the touch rod (3), and the bending section (302) enables the main body of the touch rod (3) to move backwards for a certain distance; one end, far away from sleeve pipe (201), of touch pole (3) sets up arc strip section (301), arc strip section (301) is bent to the backward circular arc.

6. The avoidance sensor mechanism for an agricultural machine according to claim 2, wherein: pivot (6) are including pivot bolt, pivot seat (601) and first pressure spring (602), pivot seat (601) are cylindric and the bottom is connected on the bottom plate, the pivot bolt passes the hinge hole and the pivot seat (601) of lever spare (2) and by the locking of lock mother, first pressure spring (602) compress tightly the lock mother with between the bottom plate lower surface.

7. The avoidance sensor mechanism for an agricultural machine according to claim 1, wherein: the top surface and the front side surface of the main box body (1) are provided with openings, a box cover (12) is correspondingly arranged, and the box cover (12) is fixed on an upper folding edge (101) and a side folding edge (102) of the main box body (1) through screws (13).

8. The avoidance sensor mechanism for an agricultural machine according to claim 1, wherein: the reset structure comprises a tensioning screw (5), a second pressure spring nut (7) and a second pressure spring (11), wherein the tensioning screw (5) penetrates through a through hole in the rear side panel of the main box body (1), the inner end of the tensioning screw (5) is provided with a pin joint seat (501), the pin joint seat (501) is connected with the short arm end of the lever member (2) in a pin joint mode, the extending part of the tensioning screw (5) is sleeved with the second pressure spring (11), and the second pressure spring nut (7) is in threaded connection with the tensioning screw (5) and compresses the second pressure spring (11) to the rear side panel of the main box body (1).

9. The avoidance sensor mechanism for an agricultural machine according to claim 8, wherein: the resetting structure further comprises gaskets (9), and the two gaskets (9) are respectively connected to two ends of the second pressure spring (11) in a pad joint mode.

10. An avoidance method of an avoidance sensing mechanism for agricultural machinery, which is characterized in that an avoidance signal is acquired by the avoidance sensing mechanism for agricultural machinery according to any one of claims 1 to 9 and is transmitted to a control circuit board of a mini-tiller or a weeder.

Technical Field

The invention relates to the technical field of agricultural machine accessories, in particular to an avoiding sensing mechanism for agricultural machinery and an avoiding method thereof.

Background

The weeding and soil loosening work among fruit trees in the orchard can cause the obstruction of trunks and the like, and the rotary cultivator and the weeding cutter can not operate smoothly, so that the mechanized operation is not facilitated. At present, manual operation is mostly adopted, so that the labor is wasted, and the labor cost is high.

In recent years, a small tiller and a weeding machine adopt an avoidance mechanism to avoid the trunk and carry out mechanized operation. The contact rod structure of the avoiding mechanism is used for conducting front detection, the contact rod is bent backwards after the trunk is collided, the hydraulic valve core at the root of the contact rod is reversed in an oil way, then the swing hydraulic cylinder is driven to retract, and the rotary cultivator and the weeding cutter at the working end avoid the trunk. However, the existing hydraulic valve structure avoiding mechanism is complex in pipeline connection, high in failure rate and high in maintenance cost, and oil leakage and blockage faults are easy to occur.

Therefore, it is necessary to develop an avoidance sensing mechanism for agricultural machinery and an avoidance method thereof.

Disclosure of Invention

The invention aims to provide an avoiding sensing mechanism for agricultural machinery, which adopts an electronic switch as a sensing element, has stable and reliable signal transmission and convenient integrated control, and adopts a closed box body structure to reduce the failure rate and the maintenance cost.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention relates to an avoiding sensing mechanism for agricultural machinery, which comprises a main box body, a lever part, a touch rod, a sensor, a rotating shaft and a reset structure, wherein the main box body is an openable sealing box body, the main box body is arranged in front of the side of a rotary cultivator or a weeding cutter through a support plate, the lever part is L-shaped and is hinged above the bottom plate of the main box body through the rotating shaft, the long arm end of the lever part extends out of the main box body and is connected with the touch rod, the touch rod is arranged in front of the rotary cultivator or the weeding cutter, and the short arm end of the lever part is connected with the reset structure; the sensor is installed on the bottom plate of the main box body, the detection head faces the cavity, and the long arm end of the lever piece can sweep over the detection head of the sensor.

Furthermore, the cross section of the lever piece is in a flat shape, a guide slit is formed in the side wall, facing the touch rod, of the main box body, and the long arm end of the lever piece is guided and swung in the guide slit.

Furthermore, the end of the long arm end of the lever member is connected with a sleeve, and the root of the touch rod is inserted into the sleeve.

Furthermore, a jackscrew is arranged on the outer wall of the sleeve, and the inner end of the jackscrew tightly presses the root of the touch rod; the root of the touch rod is provided with a milling flat table, and the inner end of the jackscrew is tightly pressed on the milling flat table.

Furthermore, the position of the touch rod close to the sleeve is provided with a bending section, and the bending section enables the main body of the touch rod to move backwards for a certain distance. One end, far away from the sleeve, of the touch rod is set to be an arc strip section, and the arc strip section is bent towards a backward arc.

Further, the pivot includes pivot bolt, pivot seat and first pressure spring, the pivot seat is cylindric and the bottom is connected on the bottom plate, the pivot bolt passes the hinge hole and the pivot seat of lever spare and by the locking of lock mother, first pressure spring compresses tightly the lock mother with between the bottom plate lower surface.

Furthermore, the top surface and the front side surface of the main box body are provided with openings, and a box cover is correspondingly arranged, and the box cover is fixed on the upper folded edge and the side folded edge of the main box body through screws.

Furthermore, the reset structure comprises a tensioning screw, a second pressure spring nut and a second pressure spring, the tensioning screw penetrates through a through hole in the rear side panel of the main box body, the inner end of the tensioning screw is provided with a pin joint seat, the pin joint seat is in pin joint with the short arm end of the lever member, the extending part of the tensioning screw is externally sleeved with the second pressure spring, and the second pressure spring nut is in threaded connection with the tensioning screw and compresses the second pressure spring to the rear side panel of the main box body.

Furthermore, the reset structure further comprises gaskets, and the two gaskets are respectively connected to two ends of the second pressure spring in a pad joint mode.

The invention also discloses an avoiding method of the avoiding sensing mechanism for the agricultural machine, which is characterized in that the avoiding signal of the avoiding sensing mechanism for the agricultural machine is acquired and transmitted to a control circuit board of a mini-tiller or a weeder.

Compared with the prior art, the invention has the beneficial technical effects that:

according to the avoiding sensing mechanism for the agricultural machine, the rotating shaft is used as a swinging fulcrum of the lever member, the lever member acquires tree trunk information through the touch rod, and in the swinging avoiding process of the lever member, the sensor transmits a signal to the controller of the equipment after acquiring the information of sweeping the tree trunk, so that avoiding action is performed, and the damage of the equipment is avoided. Through the taut lever spare of reset structure to the rotation of forearm end resets, guarantees that touching pole resets after skimming over the trunk, for dodging prepare next time. Compared with the traditional hydraulic valve type avoidance, the hydraulic oil avoidance system adopts an electronic signal acquisition mode, avoids hydraulic oil leakage, is more stable and has long service life. The touch rod is reset in a lever mode, the structure is more compact, and the action is stable and reliable. The avoidance sensing mechanism for the agricultural machine adopts the electronic switch as the sensing element, has stable and reliable signal transmission and convenient integrated control, and adopts a closed box body structure, thereby reducing the failure rate and the maintenance cost.

In addition, the cross section of the lever member is in a flat shape, so that the overlapping area of the lever member and a sensor probe is increased in the swinging process, and the signal is prevented from being acquired by mistake; through setting up the sleeve pipe at the end of lever spare long arm end, the sleeve pipe is even to contact and is bumped the pole, and the touching pole of frequent contact trunk collision is as independent part, and when the touching pole of being convenient for took place to damage, quick replacement has avoided whole mechanism to dismantle the maintenance, has reduced equipment repair cycle. Through set up at touching pole root and mill the plat form, the end compresses tightly on milling the plat form in the jackscrew, can prevent that the touching pole from taking place the not hard up condition of circumferential rotation at the collision impact in-process. The bending section is arranged on the outer side of the sleeve, so that the bending moment stress concentration of the root of the touch rod can be reduced, the occurrence of the root plastic hard bending deformation condition is reduced, and the service life of the touch rod is prolonged. The arc-shaped strip section is arranged at the far end of the touch rod, so that the trunk can smoothly slide and avoid. The hinged lever member with the rotating shaft bolt moving is tensioned through the first pressure spring, so that certain moving amount of the lever member in the axis direction of the hinged fulcrum is ensured, and the fault that the lever member is easy to lock when being clamped with sundries or rusted is avoided. The rotating shaft bolt, the first pressure spring and the lower part of the sensor are surrounded by the lower skirt edge of the main box body, so that the parts can be effectively protected, and collision damage caused in the advancing process is avoided. The main box body is arranged into the box body with the top surface and the front side surface opened, so that the operation opening is enlarged, and the maintenance of parts such as a rotating shaft, a lever piece, a sensor and the like of the box body is facilitated; through the setting of lid, the sealed box body of being convenient for effectively protects inside lever spare and sensor, avoids introducing leaf, branch debris, has guaranteed that the lever action is nimble reliable. The second pressure spring is tightly pressed on the second pressure spring nut and the outer wall of the rear side panel of the main box body, so that the tensioning screw rod can be tensioned backwards, and the long arm end of the lever piece is tightly propped against the rear end of the guide seam in the initial state of the lever piece; through the tensioning screw rod of second pressure spring nut threaded connection, can adjust the decrement of second pressure spring through the position of adjusting second pressure spring nut, and then be convenient for keep suitable dynamics of dodging, avoid appearing the mistake that strong weeds arouse dodge with fine trunk and do not have the condition of dodging.

According to the avoidance method of the avoidance sensing mechanism for the agricultural machine, the output signal of the electromagnetic induction switch or the photoelectric switch is the switching value, and the switching value is input to the control circuit board. The time delay that can set up the time delay and dodge is long, can adopt moreover through setting up selection circuit, can set up the manual control mode, closes the automatic function of dodging, and under some limit circumstances, the tractor driver controls the remote controller and carries out manual dodging, has better flexibility.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic structural view of an avoidance sensing mechanism for agricultural machinery according to the present invention;

FIG. 2 is a schematic view of the main body of the present invention with the lid removed;

FIG. 3 is a right side view of the main case of the present invention;

FIG. 4 is a schematic top sectional view of the main case of the present invention with the lid removed;

FIG. 5 is a schematic sectional view of A-A in FIG. 2.

Description of reference numerals: 1. a main box body; 101. folding the edges; 1011. a threaded hole; 102. folding the edges laterally; 103. a screw rod via hole; 104. guiding the seam; 2. a lever member; 201. a sleeve; 202. welding a nut; 203. a pin shaft hole; 3. a touch lever; 301. an arc-shaped strip section; 302. bending the section; 303. milling a flat table; 4. a sensor; 5. tensioning the screw rod; 501. a pin joint seat; 6. a rotating shaft; 601. a rotating shaft seat; 602. a first pressure spring; 7. a second compression spring nut; 8. carrying out top thread; 9. a gasket; 10. a support plate; 11. a second pressure spring; 12. a box cover; 13. and (4) screws.

Detailed Description

The core of the invention is to provide the avoiding sensing mechanism for the agricultural machinery and the avoiding method thereof, the electronic switch is used as the sensing element, the signal transmission is stable and reliable, the integrated control is convenient, and the closed box body structure is adopted, so that the failure rate and the maintenance cost are reduced.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to the accompanying drawings, fig. 1 is a schematic front view structure diagram of an avoidance sensing mechanism for agricultural machinery according to the present invention; FIG. 2 is a schematic view of the main body of the present invention with the lid removed; FIG. 3 is a right side view of the main case of the present invention; FIG. 4 is a schematic top sectional view of the main case of the present invention with the lid removed; FIG. 5 is a schematic sectional view of A-A in FIG. 2.

In a specific embodiment, as shown in fig. 1 to 5, the avoidance sensing mechanism for agricultural machinery of the present invention includes a main box body 1, a lever member 2, a touch rod 3, a sensor 4, a rotating shaft 6, and a reset structure. The main box body 1 is an openable sealing box body, and the main box body 1 is connected with a support plate 10 through side panel welding and is arranged in front of the side of the rotary cultivator or the weeding cutter. The lever 2 is L-shaped and is hinged above the bottom plate of the main box body 1 through the rotating shaft 6 at the middle part, the long arm end of the lever 2 extends out of the main box body 1 and is in contact with the touch rod 3, the touch rod 3 is arranged in front of the rotary cultivator or the weeding cutter, and the short arm end of the lever 2 is connected with the reset structure. The resetting structure tensions the lever member 2 to rotate towards the short arm end. The sensor 4 is installed on the bottom plate of the main box body 1, the detecting head faces the cavity, and the long arm end of the lever member 2 can sweep over the detecting head of the sensor 4. The sensor 4 adopts an electromagnetic induction switch or a photoelectric switch, the long arm end of the lever member 2 can swing to sweep a detection head of the sensor 4 under the driving of the touch rod 3, and the sensor 4 feeds back an electric signal to the equipment controller. The controller controls the hydraulic executive component to do swinging avoiding action of the rotary cultivator or the weeding cutter.

Through pivot 6 as the 2 wobbling fulcrums of lever spare, after lever spare 2 gathered trunk information through touching pole 3, the in-process was dodged in the swing of lever spare 2, and after sensor 4 gathered and swept trunk information, to equipment the controller signals makes and dodges the action, avoids equipment to damage. Through the taut lever spare 2 of reset structure to the rotation of short arm end resets, guarantees that touch pole 3 resets after sweeping the trunk, for dodging prepare next time. Compared with the traditional hydraulic valve type avoidance, the hydraulic oil avoidance system adopts an electronic signal acquisition mode, avoids hydraulic oil leakage, is more stable and has long service life. The touch rod 3 is reset in a lever mode, so that the structure is more compact, and the action is stable and reliable. The avoidance sensing mechanism for the agricultural machine adopts the electronic switch as the sensing element, has stable and reliable signal transmission and convenient integrated control, and adopts a closed box body structure, thereby reducing the failure rate and the maintenance cost.

In one embodiment of the present invention, as shown in fig. 2 to 4, the cross section of the lever member 2 is a flat shape, and may be a rectangle or an ellipse. The side wall of the main box body 1 facing the touch rod 3 is provided with a guide slit 104, and the long arm end of the lever member 2 is guided to swing in the guide slit 104.

Specifically, as shown in fig. 1 to 3, a sleeve 201 is coaxially welded to the end of the long arm of the lever member 2, and the root of the touch lever 3 is inserted into the sleeve 201.

Specifically, as shown in fig. 2 and 5, the outer wall of the sleeve 201 is provided with a jack 8, and the inner end of the jack 8 is pressed against the root of the touch rod 3. The outer wall of the sleeve 201 is provided with a through hole, a welding nut 202 is coaxially welded outside the through hole, and the jackscrew 8 is in threaded connection with the welding nut 202. The root of the touch rod 3 is provided with a milling flat platform 303, the milling flat platform 303 is inserted into the sleeve 201, and the inner end of the jackscrew 8 is tightly pressed on the milling flat platform 303.

The cross section of the lever member 2 is in a flat shape, so that the overlapping area of the lever member and a detection head of the sensor 4 is increased conveniently in the swinging process, and the signal is prevented from being acquired by mistake; through setting up sleeve pipe 201 at the end of 2 long arm ends of lever spare, sleeve pipe 201 is connected touching pole 3, and touching pole 3 of frequent contact trunk collision is as independent part, and when touching pole 3 of being convenient for took place to damage, whole mechanism dismantlement maintenance has been avoided to quick replacement, has reduced equipment repair cycle. Through milling the flatbed 303 in 3 roots settings of touching pole, the tip compresses tightly on milling the flatbed 303 in jackscrew 8, can prevent that touching pole 3 from taking place the not hard up condition of circumferential rotation at the collision impact in-process.

In an embodiment of the present invention, as shown in fig. 1 and 2, a bent section 302 is disposed at a position of the touch rod 3 close to the sleeve 201, the bent section 302 has an equal inward folding angle with the intersection of the root and the body, and the bent section 302 translates the body of the touch rod 3 backwards by a certain distance. One end of the touch rod 3, which is far away from the sleeve 201, is provided with an arc-shaped strip section 301, and the arc-shaped strip section 301 is bent towards the backward arc.

Set up in the sleeve pipe 201 outside through bending segment 302, can reduce touch 3 roots of the pole bending moment stress concentration, reduce the hard buckling deformation condition of root plasticity and take place, improved touch 3 life. Set up at 3 distal ends of touching pole through arc strip section 301, can smoothly the landing dodge the trunk.

In an embodiment of the present invention, as shown in fig. 2 and 4, the rotating shaft 6 includes a rotating shaft bolt, a rotating shaft seat 601 and a first compression spring 602, the rotating shaft seat 601 is cylindrical and has a bottom connected to the bottom plate, the rotating shaft bolt passes through the hinge hole of the lever member 2 and the rotating shaft seat 601 and is locked by a lock nut, and the first compression spring 602 is compressed between the lock nut and the lower surface of the bottom plate.

Specifically, bottom plate welded connection is in 1 inner wall intermediate position of main box body, the lower part of pivot bolt, first pressure spring 602 and sensor 4 all is located 1 lower part shirt rim surrounding range of main box body.

The hinged lever member 2 with the movable rotating shaft bolt is tensioned through the first pressure spring 602, so that certain movable amount of the lever member 2 in the axis direction of a hinged fulcrum is ensured, and the fault that the lever member is easy to lock when being clamped with sundries or rusted is avoided. The rotating shaft bolt, the first pressure spring 602 and the lower part of the sensor 4 are surrounded by the lower skirt edge of the main box body 1, so that the parts can be effectively protected, and collision damage caused in the advancing process is avoided.

In one embodiment of the present invention, as shown in fig. 2 to 4, the top and front sides of the main case 1 are open, and a case cover 12 is correspondingly provided, and the case cover 12 is fixed to the upper and side flanges 101 and 102 of the main case 1 by screws 13. The upper flange 101 and the side flange 102 are provided with screw holes 1011 for screwing the screws 13.

The main box body 1 is arranged into a box body with openings on the top surface and the front side surface, so that the operation opening is enlarged, and the parts of the box body, such as the rotating shaft 6, the lever part 2, the sensor 4 and the like, can be maintained conveniently; through the setting of lid 12, be convenient for seal the box body, effectively protect inside lever 2 and sensor 4, avoid introducing leaf, branch debris, guaranteed that the lever action is nimble reliable.

In a specific embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 4, the restoring structure includes a tensioning screw 5, a second compression spring nut 7 and a second compression spring 11, the tensioning screw 5 passes through a through hole on a rear side panel of the main box body 1, an inner end of the tensioning screw 5 is provided as a pin joint seat 501, the pin joint seat 501 is in pin joint with a short arm end of the lever member 2, a protruding portion of the tensioning screw 5 is externally sleeved with the second compression spring 11, and the second compression spring nut 7 is in threaded connection with the tensioning screw 5 and compresses the second compression spring 11 against the rear side panel of the main box body 1.

Obviously, the reset structure can also adopt a tension spring mode, one end of the tension spring is connected to the short arm end of the lever part 2, the other end of the tension spring is connected to the inner wall of the rear side panel of the main box body 1, and the effect of resetting by tensioning the short arm end of the lever part 2 can also be achieved. Similar structural modifications fall within the scope of the present invention.

Specifically, the reset structure further comprises gaskets 9, and the two gaskets 9 are respectively connected to two ends of the second pressure spring 11 in a cushioning mode. The diameter of the gasket 9 is larger than the outer diameter of the second compression spring 11.

The second pressure spring 11 is tightly pressed on the second pressure spring nut 7 and the outer wall of the rear side panel of the main box body 1, and the tensioning screw 5 can be tensioned backwards, so that the long arm end of the lever member 2 is tightly propped against the rear end of the guide slit 104 in the initial state of the lever member 2; through the tensioning screw rod 5 of the threaded connection of the second pressure spring nut 7, the compression amount of the second pressure spring 11 can be adjusted by adjusting the position of the second pressure spring nut 7, so that the proper avoiding force is convenient to maintain, and the situation that mistaken avoidance and fine trunk avoidance are avoided and avoidance is not caused by stout weeds is avoided.

The invention relates to a working principle of an avoidance sensing mechanism for agricultural machinery, which comprises the following steps: when a tractor pulls a mini-tiller or a weeder carrying the avoidance sensing mechanism for the agricultural machine to operate, the touch rod 3 is contacted with a front trunk and then retreats backwards to drive the lever member 2 to swing. The long arm end of the lever member 2 sweeps over the probe head of the sensor 4, triggers a signal and transmits the signal to the equipment controller. The controller controls the hydraulic cylinder to stretch out and draw back, and the rotary cultivator or the weeding cutter make an avoiding action. After the trunk passes through, the touch rod 3 is reset forwards under the reset force action of the second pressure spring 11, and preparation is made for next avoidance.

The invention also discloses an avoidance method of the avoidance sensing mechanism for the agricultural machine, which is characterized in that the avoidance sensing mechanism for the agricultural machine in any embodiment is used for collecting avoidance signals and transmitting the avoidance signals to a control circuit board of the mini-tiller or the weeding machine.

The output signal of the electromagnetic induction switch or the photoelectric switch is a switching value, and the switching value is input to the control circuit board. The time delay that can set up the time delay and dodge is long, can adopt moreover through setting up selection circuit, can set up the manual control mode, closes the automatic function of dodging, and under some limit circumstances, the tractor driver controls the remote controller and carries out manual dodging, has better flexibility.

According to the avoiding sensing mechanism for the agricultural machinery, the rotating shaft 6 is used as a swinging fulcrum of the lever member 2, the lever member 2 acquires tree trunk information through the touch rod 3, and in the swinging avoiding process of the lever member 2, the sensor 4 transmits a signal to the controller of the equipment after acquiring the information of the tree trunk sweeped, so that the avoiding action is performed, and the equipment is prevented from being damaged. Through the taut lever spare 2 of reset structure to the rotation of short arm end resets, guarantees that touch pole 3 resets after sweeping the trunk, for dodging prepare next time. Compared with the traditional hydraulic valve type avoidance, the hydraulic oil avoidance system adopts an electronic signal acquisition mode, avoids hydraulic oil leakage, is more stable and has long service life. The touch rod 3 is reset in a lever mode, so that the structure is more compact, and the action is stable and reliable. The avoidance sensing mechanism for the agricultural machine adopts the electronic switch as the sensing element, has stable and reliable signal transmission and convenient integrated control, and adopts a closed box body structure, thereby reducing the failure rate and the maintenance cost. In addition, the cross section of the lever member 2 is in a flat shape, so that the overlapping area of the lever member and a detection head of the sensor 4 is increased in the swinging process, and the signal is prevented from being acquired by mistake; through setting up sleeve pipe 201 at the end of 2 long arm ends of lever spare, sleeve pipe 201 is connected touching pole 3, and touching pole 3 of frequent contact trunk collision is as independent part, and when touching pole 3 of being convenient for took place to damage, whole mechanism dismantlement maintenance has been avoided to quick replacement, has reduced equipment repair cycle. Through milling the flatbed 303 in 3 roots settings of touching pole, the tip compresses tightly on milling the flatbed 303 in jackscrew 8, can prevent that touching pole 3 from taking place the not hard up condition of circumferential rotation at the collision impact in-process. Set up in the sleeve pipe 201 outside through bending segment 302, can reduce touch 3 roots of the pole bending moment stress concentration, reduce the hard buckling deformation condition of root plasticity and take place, improved touch 3 life. Set up at 3 distal ends of touching pole through arc strip section 301, can smoothly the landing dodge the trunk. The hinged lever member 2 with the movable rotating shaft bolt is tensioned through the first pressure spring 602, so that certain movable amount of the lever member 2 in the axis direction of a hinged fulcrum is ensured, and the fault that the lever member is easy to lock when being clamped with sundries or rusted is avoided. The rotating shaft bolt, the first pressure spring 602 and the lower part of the sensor 4 are surrounded by the lower skirt edge of the main box body 1, so that the parts can be effectively protected, and collision damage caused in the advancing process is avoided. The main box body 1 is arranged into a box body with openings on the top surface and the front side surface, so that the operation opening is enlarged, and the parts of the box body, such as the rotating shaft 6, the lever part 2, the sensor 4 and the like, can be maintained conveniently; through the setting of lid 12, be convenient for seal the box body, effectively protect inside lever 2 and sensor 4, avoid introducing leaf, branch debris, guaranteed that the lever action is nimble reliable. The second pressure spring 11 is tightly pressed on the second pressure spring nut 7 and the outer wall of the rear side panel of the main box body 1, and the tensioning screw 5 can be tensioned backwards, so that the long arm end of the lever member 2 is tightly propped against the rear end of the guide slit 104 in the initial state of the lever member 2; through the tensioning screw rod 5 of the threaded connection of the second pressure spring nut 7, the compression amount of the second pressure spring 11 can be adjusted by adjusting the position of the second pressure spring nut 7, so that the proper avoiding force is convenient to maintain, and the situation that mistaken avoidance and fine trunk avoidance are avoided and avoidance is not caused by stout weeds is avoided.

According to the avoidance method of the avoidance sensing mechanism for the agricultural machine, the output signal of the electromagnetic induction switch or the photoelectric switch is the switching value, and the switching value is input to the control circuit board. The time delay that can set up the time delay and dodge is long, can adopt moreover through setting up selection circuit, can set up the manual control mode, closes the automatic function of dodging, and under some limit circumstances, the tractor driver controls the remote controller and carries out manual dodging, has better flexibility.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.