A two-way obstacle avoidance and overload protection device for a reversible plow

Abstract

The present invention relates to the technical field of reversible plows, and specifically relates to a two-way obstacle avoidance overload protection device for a reversible plow, which includes a plow body support assembly, a double-axis bearing seat, and an overload protection oil cylinder. Plow column clamping plates are arranged on the left and right sides of the plow body support assembly, and the overload protection oil cylinder is installed between the plow column clamping plates. One side of the main plow body is the soil-turning side. Oil cylinder push rods are respectively connected to the upper and lower ends of the plow body support assembly. A longitudinal rotating shaft and a transverse rotating shaft are installed in the double-axis bearing seat. The double-axis bearing seat is rotationally connected to the plow body support assembly through the longitudinal rotating shaft, and the plow column clamping plates are installed at both ends of the transverse rotating shaft. The oil cylinder push rods are installed on the plow body support assembly through spherical plain bearings; the axis of the longitudinal rotating shaft is deflected towards the soil-turning side of the main plow body relative to the plane formed by the axes of the two oil cylinder push rods, and a limit pin is also provided between the plow body support assembly and the double-axis bearing seat. When encountering an obstacle and overloading, the reversible plow can horizontally offset and cross the obstacle while lifting upwards to achieve overload protection.

Description

Technical Field

[0001] The present invention relates to the technical field of reversible plows, and particularly relates to a two-way obstacle avoidance overload protection device for a reversible plow. Background Art

[0002] The hydraulic reversible plow is a commonly used tillage machine. During the tillage operation, there may be obstacles such as stones, tree roots, or hard soil points in the cultivated soil layer. Therefore, an overload protection device needs to be set on the reversible plow. The overload protection device of the traditional reversible plow generally realizes overload protection through safety bolts. When overloaded, the safety bolts are cut off. At this time, it is necessary to stop the machine to replace the complete safety bolts before continuing to work, which takes a lot of time and affects the operation efficiency. And the reversible plows using hydraulic overload protection on the current market can only lift upward to avoid obstacles after overload in the vertical direction, and the obstacle avoidance effect is poor. Summary of the Invention

[0003] Aiming at the problem of the single obstacle avoidance direction of the hydraulic overload protection device used in the current reversible plow, the present invention proposes a two-way obstacle avoidance overload protection device for a reversible plow, which realizes two-way obstacle avoidance in the vertical and horizontal directions. The specific technical solutions are as follows:

[0004] A two-way obstacle avoidance overload protection device for a reversible plow includes a plow body support assembly, a double-axis bearing seat, and an overload protection oil cylinder arranged at the rear side of the plow body support assembly. Plow column clamps are provided on the left and right sides of the plow body support assembly. The overload protection oil cylinder is installed between the plow column clamps. The upper and lower sides of the overload protection oil cylinder are provided with a main plow body. One side of the main plow body is the soil turning side. The upper and lower ends of the plow body support assembly are respectively connected with oil cylinder push rods. A longitudinal rotating shaft and a transverse rotating shaft are installed in the double-axis bearing seat. The double-axis bearing seat is rotationally connected with the plow body support assembly through the longitudinal rotating shaft. The plow column clamps are installed at both ends of the transverse rotating shaft. The plow column clamps are rotationally connected with the double-axis bearing seat through the transverse rotating shaft. The oil cylinder push rods are installed on the plow body support assembly through spherical plain bearings; the axis of the longitudinal rotating shaft is deflected towards the soil turning side of the main plow body relative to the plane formed by the axes of the two oil cylinder push rods. A limit pin for restricting the horizontal deflection range of the plow column clamp is also provided between the plow body support assembly and the double-axis bearing seat. When the reversible plow is in a horizontal state, the other ends of the two oil cylinder push rods both abut against the oil cylinder piston of the overload protection oil cylinder. When the reversible plow is lifted upward, the oil cylinder push rod at the lower side is separated from the oil cylinder piston of the overload protection oil cylinder.

[0005] Further, the double-axis bearing seat includes a longitudinal shaft mounting seat with a longitudinal shaft mounting hole and a transverse shaft mounting seat with a transverse shaft mounting hole. A longitudinal shaft lubricating hole is opened on the side wall of the longitudinal shaft mounting hole, and a transverse shaft lubricating hole is opened on the side wall of the transverse shaft mounting hole.

[0006] Further, the plow body support assembly includes two horizontally arranged panels and two vertically arranged vertical plates. When installed, the tipping plow beam is located between the two panels. The panels are provided with connection holes for connecting with the tipping plow beam, longitudinal shaft holes for installing the longitudinal shaft, and several amplitude adjustment holes for adjusting the working width. A stop plate for restricting the rotation of the longitudinal shaft is also provided beside the longitudinal shaft hole. The vertical plates are provided with large through holes for the transverse shaft mounting seat to pass through, and the oil cylinder push rod is installed between the vertical plates.

[0007] Further, the double-shaft bearing seat further includes a limit pin mounting seat with limit pin mounting holes. The longitudinal shaft mounting seat and the limit pin mounting seat are respectively located on the front and rear sides of the transverse shaft mounting seat. Small through holes for the limit pin to pass through are opened on the vertical plate close to the soil-turning side. The two ends of the limit pin are respectively a threaded end and a countersunk head end. After the double-shaft bearing seat is assembled with the plow body support assembly, the threaded end of the limit pin is installed in the limit pin mounting seat, the countersunk head end of the limit pin is located between the two vertical plates, and the countersunk head end of the limit pin and the limit pin mounting seat sandwich the vertical plate close to the soil-turning side in the middle. When the tipping plow is in the horizontal working state, the countersunk head end of the limit pin fits with the vertical plate close to the soil-turning side for limiting.

[0008] Further, a countersunk head gasket is also provided between the countersunk head end of the limit pin and the vertical plate close to the soil-turning side.

[0009] Further, guide plates are provided on the inner side walls of the two plow column clamping plates. The two guide plates are respectively in contact with the left and right sides of the oil cylinder push rod, and two guide blocks are also provided between the two guide plates. The guide blocks are respectively located on the upper and lower sides of the oil cylinder push rod group composed of two oil cylinder push rods.

[0010] Further, a piston top block is also provided between the oil cylinder push rod group composed of two oil cylinder push rods and the oil cylinder piston of the overload protection oil cylinder.

[0011] Further, both the longitudinal shaft mounting seat and the transverse shaft mounting seat are tubular, and a connecting rib is also provided between the longitudinal shaft mounting seat and the transverse shaft mounting seat.

[0012] Further, a connecting plate for strengthening the structural strength is also provided between the two vertical plates, and a reinforcing rib is also provided at the connection between the vertical plate and the panel.

[0013] The beneficial effects of the present invention are as follows:

[0014] When the tipping plow using the present invention as an overload protection device encounters an obstacle and is overloaded, the tipping plow can horizontally offset and cross over the obstacle while lifting upward, so as to perform overload protection, perform two-way obstacle avoidance, the overload does not stop the machine, and the obstacle avoidance effect and obstacle avoidance adaptability are good. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the two-way obstacle avoidance overload protection device for the reversible plow according to the present invention;

[0017] Figure 2 It is a cross-sectional view of the two-way obstacle avoidance overload protection device for the reversible plow according to the present invention;

[0018] Figure 3 It is a three-dimensional schematic diagram of the plow body bracket assembly according to the present invention;

[0019] Figure 4 It is a schematic diagram of the plow body bracket assembly according to the present invention Figure 1 ;

[0020] Figure 5 It is a schematic diagram of the plow body bracket assembly according to the present invention Figure 2 ;

[0021] Figure 6 It is a schematic diagram of the plow body bracket assembly according to the present invention Figure 3 ;

[0022] Figure 7 It is a three-dimensional schematic diagram of the double-axis bearing seat according to the present invention;

[0023] Figure 8 It is a cross-sectional view of the double-axis bearing seat according to the present invention Figure 1 ;

[0024] Figure 9 It is a cross-sectional view of the double-axis bearing seat according to the present invention Figure 2 ;

[0025] Figure 10 It is a schematic diagram of the horizontal deflection trajectory in the embodiment;

[0026] Figure 11 It is a schematic diagram of the double-axis bearing seat in the overload state in the embodiment;

[0027] Figure 12 It is a schematic diagram of the double-axis bearing seat in the normal working state in the embodiment.

[0028] In the figure: 1. Combined plow body support; 1.1 Panel; 1.11 Connecting hole; 1.12 Amplitude adjustment hole; 1.13 Longitudinal rotating shaft hole; 1.2 Vertical plate; 1.21 Small through hole; 1.22 Large through hole; 1.23 Pin shaft hole; 1.3 Connecting plate; 1.4 Stop plate; 1.5 Reinforcing rib; 2. Double-shaft bearing seat; 2.1 Longitudinal shaft mounting seat; 2.11 Longitudinal shaft mounting hole; 2.12 Longitudinal shaft lubricating oil hole; 2.2 Transverse shaft mounting seat; 2.21 Transverse shaft mounting hole; 2.22 Transverse shaft lubricating oil hole; 2.3 Limit pin mounting seat; 2.31 Limit pin mounting hole; 2.4 Connecting rib; 3. Longitudinal rotating shaft; 4. Transverse rotating shaft; 5. Limit pin; 6. Countersunk head gasket; 7. Left plow column clamp plate; 8. Right plow column clamp plate; 9. Oil cylinder push rod; 10. Small plow column clamp plate; 11. Small plow column; 12. Small sub-plow; 13. Large plow column; 14. Main plow body; 15. Overload protection oil cylinder; 15.1 Oil cylinder piston; 15.2 Piston top block; 16. Safety bolt; 17. Fixed bolt; 18. Guide block; 19. Guide plate. Detailed implementation manners

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] Taking the forward direction of the reversible plow as the front side and the right side of the main plow body as the soil-turning side as an example, the present invention provides the following specific implementation schemes:

[0031] As Figures 1-9As shown in the figure, the present invention provides a two-way obstacle avoidance overload protection device for a reversible plow, which includes a plow body support assembly 1, a double-axis bearing seat 2, and an overload protection oil cylinder 15 arranged at the rear side of the plow body support assembly 1. Plow column clamping plates are provided on the left and right sides of the plow body support assembly 1, namely a left plow column clamping plate 7 and a right plow column clamping plate 8. The overload protection oil cylinder 15 is fixedly installed between the plow column clamping plates. The upper and lower sides of the overload protection oil cylinder 15 are provided with a main plow body 14. The main plow body 14 is installed between the plow column clamping plates through a large plow column 13. One side of the main plow body 14 is the soil-turning side. The upper and lower ends of the plow body support assembly are respectively connected with an oil cylinder push rod 9. A longitudinal rotating shaft 3 and a transverse rotating shaft 4 are installed in the double-axis bearing seat 2. The double-axis bearing seat 2 is rotationally connected with the plow body support assembly 1 through the longitudinal rotating shaft 3. The plow column clamping plates are installed at both ends of the transverse rotating shaft 4. The plow column clamping plates are rotationally connected with the double-axis bearing seat 2 through the transverse rotating shaft 4. The oil cylinder push rod 9 is installed on the plow body support assembly 1 through a spherical plain bearing; the axis of the longitudinal rotating shaft 3 is deflected towards the soil-turning side of the main plow body relative to the plane formed by the axes of the two oil cylinder push rods 9. A limit pin 5 for restricting the horizontal deflection range of the plow column clamping plate is also provided between the plow body support assembly 1 and the double-axis bearing seat 2. When the plow body of the reversible plow is working normally (in a horizontal state), the other ends of the two oil cylinder push rods 9 both abut against the oil cylinder piston 15.1 of the overload protection oil cylinder 15. When the plow body of the reversible plow is lifted upward, the oil cylinder push rod 9 located at the lower side is separated from the oil cylinder piston 15.1 of the overload protection oil cylinder 15.

[0032] Preferably, the double-axis bearing seat 2 includes a longitudinal shaft mounting seat 2.1 with a longitudinal shaft mounting hole 2.11 and a transverse shaft mounting seat 2.2 with a transverse shaft mounting hole 2.21. A longitudinal shaft lubricating hole 2.12 is opened on the side wall of the longitudinal shaft mounting hole 2.11, and a transverse shaft lubricating hole 2.22 is opened on the side wall of the transverse shaft mounting hole 2.21.

[0033] Preferably, the plow body support assembly 1 includes two horizontally arranged panels 1.1 and two vertically arranged vertical plates 1.2. When installed, the reversible plow beam is located between the two panels 1.1. The panel 1.1 is provided with a connection hole 1.11 for connecting with the reversible plow beam, a longitudinal shaft hole 1.13 for installing the longitudinal rotating shaft 3, and several amplitude adjustment holes 1.12 for adjusting the working width. When the plow body support assembly 1 and the beam are assembled, the amplitude adjustment holes 1.12 to be used are determined according to the required working width. A stop plate 1.4 for restricting the rotation of the longitudinal rotating shaft 3 is also provided beside the longitudinal shaft hole 1.13. The vertical plate 1.2 is provided with a large through hole 1.22 for the transverse shaft mounting seat 2.2 to pass through. Pin holes 1.23 are also arranged at the upper and lower ends of the vertical plate 1.2. Correspondingly, pins are provided at the upper and lower ends of the vertical plate 1.2. The oil cylinder push rod 9 is installed between the vertical plates 1.2 through corresponding spherical plain bearings and pins. Among them, the oil cylinder push rod 9 is fixedly connected with the outer ring of the spherical plain bearing, and the pin is fixedly connected with the inner ring of the spherical plain bearing.

[0034] Preferably, the double-axis bearing seat 2 further includes a limit pin mounting seat 2.3 with a limit pin mounting hole 2.31. The longitudinal axis mounting seat 2.1 and the limit pin mounting seat 2.3 are respectively located on the front and rear sides of the transverse axis mounting seat 2.2. A small through hole 1.21 for the limit pin to pass through is provided on the vertical plate 1.2 that is closer to the soil-turning side (on the right side in this embodiment) among the two vertical plates. The two ends of the limit pin 5 are respectively a threaded end and a countersunk head end. After the double-axis bearing seat 2 is assembled with the plow body bracket assembly 1, the threaded end of the limit pin 5 is installed in the limit pin mounting seat 2.3, the countersunk head end of the limit pin 5 is between the two vertical plates 1.2, and the countersunk head end of the limit pin 5 and the limit pin mounting seat 2.3 clamp the vertical plate 1.2 on the right side in the middle. When the rotary plow is in the horizontal working state, the countersunk head end of the limit pin 5 fits against the vertical plate 1.2 on the right side for limiting. The countersunk head end of the limit pin 5 can only move away from the vertical plate 1.2 on the right side, so that the plow body of the rotary plow can only deflect to the left. When the countersunk head end of the limit pin 5 abuts against the vertical plate 1.2 on the left side, the maximum angle of the left deflection of the plow body of the rotary plow is reached.

[0035] Preferably, a countersunk gasket 6 for buffering is further provided between the countersunk head end of the limit pin and the vertical plate 1.2 that is closer to the soil-turning side (on the right side in this embodiment) among the two vertical plates.

[0036] Preferably, guide plates 19 are provided on the inner side walls of the two plow column clamping plates. The two guide plates 19 are respectively in contact with the left and right sides of the oil cylinder push rod 9. The guide plates 19 are used to limit the axes of the two oil cylinder push rods 9 to be in the same vertical plane. Two guide blocks 18 are further provided between the two guide plates 19. The guide blocks 18 are respectively located on the upper and lower sides of the oil cylinder push rod group composed of the two oil cylinder push rods 9. The guide blocks 18 are used to ensure the reset of the lower oil cylinder push rod 9 after it is separated from the oil cylinder piston 15.1.

[0037] Preferably, a piston top block 15.2 is further provided between the oil cylinder push rod group composed of the two oil cylinder push rods 9 and the oil cylinder piston 15.1 of the overload protection oil cylinder 15. The piston top block 15.2 plays a buffering role.

[0038] Preferably, both the longitudinal axis mounting seat 2.1 and the transverse axis mounting seat 2.2 are tubular, and a connecting rib 2.4 for strengthening the structural strength is further provided between the longitudinal axis mounting seat 2.1 and the transverse axis mounting seat 2.2.

[0039] Preferably, a connecting plate 1.3 for strengthening the structural strength is further provided between the two vertical plates 1.2, and a reinforcing rib 1.5 is further provided at the connection between the vertical plate 1.2 and the panel 1.1.

[0040] Preferably, the plow body includes a set of main plow bodies 14 and small auxiliary plows 12 on the upper side and a set of main plow bodies 14 and small auxiliary plows 12 on the lower side. Small plow column splints 10 are provided on both the upper and lower sides of each plow column splint. The small auxiliary plows 12 are installed between the corresponding small plow column splints 10 through the corresponding small plow columns 11; the main plow bodies 14 are all installed between the two plow column splints through the corresponding large plow columns 13, and the large plow columns 13 are installed between the two plow column splints through the corresponding fixing bolts 17 and corresponding safety bolts 16. When the overload limit is reached, the safety bolts 16 are cut off.

[0041] Among them, the overload protection process is as follows:

[0042] As Figure 10 shown, when there is no overload, if the plow body of the reversible plow is to deflect horizontally, the oil cylinder push rod 9 needs to push the oil cylinder piston 15.1 to move, and at this time the oil cylinder piston 15.1 will push it back to keep it in a non-deflected state for normal plowing.

[0043] As Figure 11 shown, during overload, the main plow body 14 touches an obstacle, increasing the resistance on the main plow body 14. The main plow body 14 drives the large plow column 13, the overload protection oil cylinder 15, the left plow column splint 7 and the right plow column splint 8 to rotate upward around the transverse shaft 4 of the double-shaft bearing seat 2 to avoid the obstacle (the tillage depth becomes shallower). The oil cylinder push rod 9 above presses the oil cylinder piston 15.1 of the overload protection oil cylinder 15 into the overload protection oil cylinder 15 through the top piston top block 15.2, and the hydraulic oil in the overload protection oil cylinder 15 enters the accumulator for energy storage; at this time, the oil cylinder push rod 9 below is disengaged from the piston top block 15.2 in the oil cylinder piston 15.1 of the overload protection oil cylinder 15. This process is the overload protection for upward lifting to avoid obstacles.

[0044] When lifting upward to avoid obstacles, since the oil cylinder piston 15.1 has been pushed in, under the action of the soil-turning lateral force of the main plow body 14, the main plow body 14 drives the large plow column 13, the overload protection oil cylinder 15, the left plow column splint 7, the right plow column splint 8, the transverse shaft 4 and the double-shaft bearing seat 2 to rotate around the longitudinal shaft 3 in the direction of the non-plowed land to avoid the obstacle. This process is the overload protection for horizontal offset to avoid obstacles.

[0045] As Figure 12 shown, when the main plow body 14 passes over the obstacle, under the action of the accumulator, the high-pressure hydraulic oil flows back into the overload protection oil cylinder 15 again, and the oil cylinder piston 15.1 of the overload protection oil cylinder 15 is pushed back. Driven by the overload protection oil cylinder 15, the left plow column splint 7, the right plow column splint 8, the overload protection oil cylinder 15, the large plow column 13, and the main plow body 14 rotate downward around the transverse shaft 4 and rotate back in the direction of the plowed land around the longitudinal shaft 3. Finally, the oil cylinder push rod 9 below contacts the piston top block 15.2 of the overload protection oil cylinder 15 and returns to the normal working position (the tillage depth is restored to normal).

[0046] When encountering an overload due to an obstacle, the reversible plow can lift upward and horizontally offset to cross the obstacle for overload protection, enabling two-way obstacle avoidance without stopping the machine during overload, with good obstacle avoidance effect and adaptability.

[0047] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A bidirectional obstacle avoidance overload protection device for a reversible plow, comprising a plow body support assembly (1) and an overload protection oil cylinder (15) arranged at the rear side of the plow body support assembly (1), plow column clamps are arranged on the left and right sides of the plow body support assembly (1), the overload protection oil cylinder (15) is installed between the plow column clamps, a main plow body (14) is arranged on the upper and lower sides of the overload protection oil cylinder (15), one side of the main plow body (14) is a soil turning side, and the upper and lower ends of the plow body support assembly (1) are respectively connected to a cylinder push rod (9), when the reversible plow is in a horizontal working state, the other end of the cylinder push rod (9) abuts against the cylinder piston (15.1) of the overload protection oil cylinder (15), characterized in that: The utility model also comprises a double-axis bearing seat (2), wherein a longitudinal axis (3) and a transverse axis (4) are installed in the double-axis bearing seat (2), the double-axis bearing seat (2) is rotatably connected to the plow body support assembly (1) through the longitudinal axis (3), a plow column clamp is installed at both ends of the transverse axis (4), the plow column clamp is rotatably connected to the double-axis bearing seat (2) through the transverse axis (4), and a cylinder push rod (9) is installed on the plow body support assembly (1) through a joint bearing; the axis of the longitudinal axis (3) is deflected toward the soil turning side of the main plow body (14) relative to the plane formed by the axes of the two cylinder push rods (9), and a limit pin (5) for limiting the horizontal deflection range of the plow column clamp is also provided between the plow body support assembly (1) and the double-axis bearing seat (2); when overloaded, the cylinder push rod (9) at the top will push the cylinder piston (15) of the overload protection cylinder (15) .1) is pressed into the overload protection cylinder (15), and the cylinder push rod (9) below is disengaged from the cylinder piston (15.1) of the overload protection cylinder (15); the double-axis bearing seat (2) includes a longitudinal axis mounting seat (2.1) with a longitudinal axis mounting hole (2.11), a transverse axis mounting seat (2.2) with a transverse axis mounting hole (2.21), and a limit pin mounting seat (2.3) with a limit pin mounting hole (2.31), a longitudinal axis lubricating oil hole (2.12) is opened on the side wall of the longitudinal axis mounting hole (2.11), a transverse axis lubricating oil hole (2.22) is opened on the side wall of the transverse axis mounting hole (2.21), and the longitudinal axis mounting seat (2.1) is provided with a longitudinal axis lubricating oil hole (2.12). .1) and the limit pin mounting seat (2.3) are respectively located on the front and rear sides of the transverse axis mounting seat (2.2); the plow body support assembly (1) includes two horizontally arranged panels (1.1) and two vertically arranged upright plates (1.2); when installed, the tilting plow beam is located between the two panels (1.1); the panel (1.1) is provided with a connecting hole (1.11) for connecting with the tilting plow beam, a longitudinal rotation axis hole (1.13) for installing the longitudinal rotation axis (3) and a plurality of holes for adjusting the working A wide amplitude modulation hole (1.12) is provided, and a stop plate (1.4) for limiting the rotation of the longitudinal rotation shaft (3) is provided next to the longitudinal rotation shaft hole (1.13). A large through hole (1.22) for the transverse axis mounting seat (2.2) to pass through is provided on the vertical plate (1.2). The cylinder push rod (9) is installed between the vertical plates (1.2). A small through hole (1.21) for the limit pin (5) to pass through is opened on the vertical plate (1.2) close to the soil turning side. The limit pin (5) has a threaded end and a countersunk end at both ends. After the head end, the dual-axis bearing seat (2) and the plow body support assembly (1) are assembled, the threaded end of the limit pin (5) is installed in the limit pin mounting seat (2.3), the countersunk end of the limit pin (5) is located between the two vertical plates (1.2), and the countersunk end of the limit pin (5) and the limit pin mounting seat (2.3) sandwich the vertical plate (1.2) close to the soil turning side; when the reversing plow is in a horizontal working state, the countersunk end of the limit pin (5) fits the vertical plate (1.2) close to the soil turning side for limiting.

2. A bidirectional obstacle avoidance overload protection device for a reversible plow according to claim 1, characterized in that: A countersunk gasket (6) is also provided between the countersunk end of the limit pin (5) and the vertical plate (1.2) close to the soil turning side.

3. A bidirectional obstacle avoidance overload protection device for a reversible plow according to claim 1, characterized in that: Guide plates (19) are provided on the inner side walls of the two plow column clamps. The two guide plates (19) are respectively fitted with the left and right sides of the oil cylinder push rod (9). Two guide blocks (18) are also provided between the two guide plates (19). The guide blocks (18) are respectively located at the upper and lower sides of the oil cylinder push rod group composed of the two oil cylinder push rods (9).

4. A bidirectional obstacle avoidance overload protection device for a reversible plow according to claim 1, characterized in that: A piston top block (15.2) is also provided between the cylinder push rod group consisting of two cylinder push rods (9) and the cylinder piston (15.1) of the overload protection cylinder (15).

5. A bidirectional obstacle avoidance overload protection device for a reversible plow according to claim 1, characterized in that: The longitudinal axis mounting seat (2.1) and the transverse axis mounting seat (2.2) are both tubular, and a connecting rib (2.4) is provided between the longitudinal axis mounting seat (2.1) and the transverse axis mounting seat (2.2).

6. A bidirectional obstacle avoidance overload protection device for a reversible plow according to claim 1, characterized in that: A connecting plate (1.3) for enhancing structural strength is provided between the two vertical plates (1.2), and reinforcing ribs (1.5) are provided at the connection between the vertical plates (1.2) and the panel (1.1).

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