Central tie rod quick hitch for mounted agricultural implements

Abstract

The utility model discloses a central pull rod quick coupling device for suspended agricultural machinery, which belongs to agricultural machinery; side plates are fixedly mounted on both ends of the upper and lower shafts, a hanging plate with a hanging pin is mounted on the upper shaft, arc-shaped slide holes A and B are arranged on the side plates, an L-shaped pull rod frame is hingedly mounted on the inner wall surface of the side plate through a pin shaft D, a pin shaft A mounted on the L-shaped pull rod frame is inserted into the arc-shaped slide hole A, a linkage plate is mounted on the end of the pin shaft A, a front hook is mounted on the lower shaft, a rear hook is hung and mounted on the arc-shaped slide hole C of the linkage plate through a pin shaft B, the pin shaft B is inserted into the arc-shaped slide hole A, a pin shaft C with an eccentric wheel is sequentially inserted into the arc-shaped slide hole B on the side plate and the circular holes of the front and rear hooks, and upper and lower holes for fixed mounting are arranged on the side plate; the utility model realizes the quick coupling between the central pull rod of the tractor and the hanging point on the suspended agricultural machinery, has a unique and reasonable structure, is simple and convenient to operate, has high coupling efficiency, has strong applicability, and is reliable to use.

Description

Technical Field

[0001] The invention belongs to agricultural machinery, and mainly relates to a tractor central pull rod and a hanging agricultural implement coupling device. Background Art

[0002] The central tie rod of the three-point suspension mechanism of the existing tractor hydraulic system adopts a ball joint structure installed at its rear end. When it is connected with the upper suspension point of the three-point suspension device of the agricultural machinery, the machine operator inserts the coupling pin into the ball joint of the central tie rod and the upper suspension point hole in sequence to complete the coupling between the tractor central tie rod and the upper suspension point of the agricultural machinery. When coupling, it is very difficult to align the coaxial center between the ball joint on the central tie rod and the upper suspension point of the agricultural machinery. In particular, since the position of the upper suspension point of the agricultural machinery is fixed, the difficulty of coupling is increased, the coupling efficiency is low, and it is time-consuming, labor-intensive and labor-intensive. In order to solve the above problems, in recent years, a central tie rod with a hook structure installed on the rear end of the central tie rod has been applied to the tractor hydraulic suspension mechanism, and is connected to the coupling pin by a buckle locking method. Compared with the prior art, the coupling efficiency is improved, but since the upper suspension point position of the three-point suspension device of the agricultural machinery cannot be adjusted, that is, the position of the coupling pin cannot be changed, the convenience and efficiency of the coupling operation still need to be improved. Summary of the invention

[0003] The purpose of the present invention is to design a new structure of a central pull rod quick coupler for suspended agricultural machinery in response to the problems existing in the above-mentioned prior art, in combination with the actual needs of the suspension and connection operations of suspended agricultural machinery, so as to achieve the goals of strong applicability, high degree of commonality, greatly improved coupling efficiency, and saving labor, effort and time.

[0004] The purpose of the invention is achieved in this way: side plates are fixedly mounted parallel to and symmetrically on both ends of the upper shaft and the lower shaft, two hanging plates are rotatably mounted on the upper shaft, and the hanging pins are mounted on the lower ends of the two hanging plates and are located in the grooves at the lower parts of the side plates; arc-shaped slide holes A and arc-shaped slide holes B are symmetrically arranged on the side plates on both sides, an L-shaped pull rod frame is rotatably hingedly mounted on the relatively inner side walls of the side plates on both sides through a pin shaft D, the pin shaft A mounted on the L-shaped pull rod frame is movably inserted in the arc-shaped slide hole A, and a linkage plate is mounted on the end of the pin shaft A, located on the outer wall of the side plate; on the lower shaft Two front hooks are rotatably mounted on the upper part, and the rear hook is hung and installed in the arc-shaped slide hole C on the lower part of the linkage plate by inserting the pin shaft B. The pin shaft C is movably inserted and installed on the arc-shaped slide hole B, and is sequentially inserted in series into the round holes on the rear hook and the front hook. An eccentric wheel is rotatably mounted on the pin shaft C at the inner side of the round hole of the rear hook. The rotation center of the eccentric wheel is not concentric with the center of the round hole of the rear hook, and the outer part of the eccentric wheel is in contact with the round hole of the rear hook; the fixed installation upper hole and the fixed installation lower hole are symmetrically arranged on the two side plates, thereby forming a central pull rod quick coupler for suspended agricultural machinery.

[0005] The invention creates a central pull rod buckle locking method using a hitch pin and a hook structure with adjustable position and self-returning locking, thereby realizing rapid hooking between the central pull rod of the tractor and the hanging point on the suspended agricultural machinery. The invention has the characteristics of novel, unique and reasonable structure, simple and convenient hooking control, high hooking efficiency, strong applicability and reliable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of a central pull rod quick hitch for a suspended agricultural implement;

[0007] Figure 2 yes Figure 1 Left view of;

[0008] Figure 3 yes Figure 2 AA section view;

[0009] Figure 4 It is a partial section Figure 1 view;

[0010] Figure 5 It is a three-dimensional schematic diagram of the overall structure of a central pull rod quick hitch of a suspended agricultural machinery.

[0011] Description of part numbers in the figure:

[0012] 1. L-shaped pull rod frame, 2. side plate, 3. pin A, 4. fixed installation upper hole, 5. lower shaft, 6. rear hook, 7. fixed installation lower hole, 8. hook pin, 9. front hook, 10. pin B, 11. pin C, 12. arc slide hole B, 13. pin D, 14. arc slide hole C, 15. linkage plate, 16. arc slide hole A, 17. hanging plate, 18. upper shaft, 19. eccentric wheel. DETAILED DESCRIPTION

[0013] The following is a detailed description of the implementation scheme of the invention in conjunction with the accompanying drawings. A central pull rod quick hitch for a suspended agricultural implement, wherein side plates 2 are fixedly mounted parallel and symmetrically on both ends of an upper shaft 18 and a lower shaft 5, two hanging plates 17 are rotatably mounted on the upper shaft 18, and a hooking pin 8 is mounted on the lower ends of the two hanging plates 17 and located in a groove at the lower portion of the side plate 2; arc-shaped slide holes A16 and arc-shaped slide holes B12 are symmetrically provided on the side plates 2 on both sides, an L-shaped pull rod frame 1 is rotatably hingedly mounted on the inner side walls of the side plates 2 on both sides through a pin shaft D13, a pin shaft A3 mounted on the L-shaped pull rod frame 1 is movably inserted in the arc-shaped slide hole A16, and a hooking pin 8 is mounted on the end of the pin shaft A3 at the outer wall of the side plate 2. A linkage plate 15; two front hooks 9 are rotatably mounted on the lower shaft 5; a rear hook 6 is suspended and installed in an arc-shaped slide hole C14 on the lower part of the linkage plate 15 by inserting a pin shaft B10; a pin shaft C11 is movably inserted and installed in the arc-shaped slide hole B12, and is sequentially inserted in series into the circular holes on the rear hook 6 and the front hook 9; an eccentric wheel 19 is rotatably mounted on the pin shaft C11 at the inner side of the circular hole of the rear hook 6; the rotation center of the eccentric wheel 19 is not concentric with the center of the circular hole of the rear hook 6, and the outer portion of the eccentric wheel 19 is in contact with the circular hole of the rear hook 6; a fixed installation upper hole 4 and a fixed installation lower hole 7 are symmetrically arranged on the two side plates 2.

[0014] When the device is used for hanging, the upper fixing hole 4 and the lower fixing hole 7 are used to fix the device as a whole on the upper hanging point of the three-point hanging device of the hanging agricultural machinery; when the L-shaped tie rod frame 1 is pulled upward, and the L-shaped tie rod frame 1 is relatively rotated around the pin shaft D13 on the fixed side plate 2, the pin shaft A3 moves upward in the arc slide hole A16, and pulls the pin shaft B10 upward synchronously through the linkage plate 15, driving the rear hook 6 to rotate around the pin shaft C11. When the rear hook 6 rotates around the pin shaft C11, the eccentric wheel 19 in the circular hole on the rear hook 6 pushes the rear hook 6 to the rear side, and the rear hook 6 rises, disengages from the card position cooperation with the hanging pin 8, and the pin shaft C11 is pulled upward. 11 continues to move upward in the arc-shaped slide hole B12, and uses the pin shaft C11 to drive the front hook 9 to rotate around the lower shaft 5. At this time, the coupling pin 8 is successively disengaged from the buckle locking cooperation with the rear hook 6 and the front hook 9, and the hanging plate 17 is rotated on the upper shaft 18 to make the coupling pin 8 disengage from the groove of the side plate 2, and the tractor central pull rod is connected to the coupling pin 8 by the hook buckle locking. At this time, the tractor retreats, and under the rear thrust of the tractor and the control of the hanging plate 17, the coupling pin 8 successively lifts the front hook 9 and the rear hook 6, and the coupling pin 8 enters the groove of the side plate 2, and is locked by the automatic return of the front hook 9 and the rear hook 6, completing the quick coupling.

Claims

1. A central pull rod quick hitch for a suspended agricultural implement, characterized in that: The side plates (2) are fixedly mounted parallel to and symmetrically on the two ends of the upper shaft (18) and the lower shaft (5); two hanging plates (17) are rotatably mounted on the upper shaft (18); the hanging pins (8) are mounted on the lower ends of the two hanging plates (17) and are located in the grooves at the lower parts of the side plates (2); arc-shaped slide holes A (16) and arc-shaped slide holes B (12) are symmetrically arranged on the side plates (2) on both sides; an L-shaped pull rod frame (1) is rotatably hingedly mounted on the relatively inner wall surfaces of the side plates (2) on both sides through a pin shaft D (13); a pin shaft A (3) mounted on the L-shaped pull rod frame (1) is movably inserted into the arc-shaped slide hole A (16); a linkage plate (15) is mounted on the end of the pin shaft A (3) and located on the outer wall surface of the side plate (2); Two front hooks (9) are rotatably mounted on the lower shaft (5); a rear hook (6) is hung and mounted in an arc-shaped slideway hole C (14) on the lower part of the linkage plate (15) by inserting a pin shaft B (10); a pin shaft C (11) is movably inserted and mounted on the arc-shaped slideway hole B (12), and is sequentially inserted in series into the circular holes on the rear hook (6) and the front hook (9); an eccentric wheel (19) is rotatably mounted on the pin shaft C (11) at the inner side of the circular hole of the rear hook (6); the rotation center of the eccentric wheel (19) is not concentric with the center of the circular hole of the rear hook (6); the outer portion of the eccentric wheel (19) is in contact with the circular hole of the rear hook (6); and a fixed mounting upper hole (4) and a fixed mounting lower hole (7) are symmetrically arranged on the two side plates (2).

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