Hinge pin anti-rotation upper adjusting screw rod of lifting rod

Abstract

The utility model relates to the technical field of tractor accessories, in particular to a pin shaft anti-rotation hinged type lifting rod upper adjusting screw rod which comprises an upper adjusting screw rod body, a shaft sleeve is fixedly installed at the end of the upper adjusting screw rod body, a pin shaft is rotatably installed in the shaft sleeve, and the two ends of the pin shaft extend out of the shaft sleeve. The two ends of the pin shaft are rotationally sleeved with connecting forks, the inner side faces of two connecting arms of each connecting fork are attached to the two outer side faces of the shaft sleeve respectively, connecting holes are formed in the top face and the bottom face of each connecting fork in a penetrating mode, and the connecting holes are used for being connected with lifting arms. The side face of the connecting fork is provided with a pin shaft anti-rotation device used for preventing the pin shaft from rotating relative to the connecting fork. When the lifting arm drives the connecting fork to move, the connecting fork and the pin shaft rotate around the shaft sleeve together, the pin shaft anti-rotation device enables the pin shaft and the connecting fork not to rotate relatively, friction between the pin shaft and the connecting fork is reduced, and the service life of the adjusting screw rod on the lifting rod is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor accessories, in particular to an adjusting screw rod on a pin-shaft anti-rotation hinged lifting rod. Background Art

[0002] When the lifting arm at the rear of the tractor is mounted with agricultural tools, it needs to be connected through the lifting rod, which plays a role in transmitting tension during the operation. At present, the commonly used connection between the lifting rod and the lifting arm adopts the form of a ball head and a pin shaft rotation connection. The ball head seat is bent inward to cover the ball head part. There is a through hole on the ball head, and a pin shaft is installed in the through hole. The pin shaft is rotatably connected to the lifting arm. Since the rotation between the pin shaft and the ball head seat is inevitable, the pin shaft and the ball head always exert force on the ball head seat. When the force is large, the ball head seat of the adjusting screw on the lifting rod is easy to break from the center, which affects the service life of the lifting rod. Therefore, it is very necessary to prevent the pin shaft from rotating and increase the service life of the lifting rod. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an adjusting screw rod on a pin shaft anti-rotation hinged lifting rod which can prevent the pin shaft from rotating, reduce wear and increase the service life.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: an upper adjusting screw of a pin-rotation articulated lifting rod, comprising an upper adjusting screw body, a sleeve fixedly installed at the end of the upper adjusting screw body, a pin rotatably installed in the sleeve, and both ends of the pin extending out of the sleeve; connecting forks are provided on the rotating sleeves at both ends of the pin, and the inner sides of the two connecting arms of the connecting fork are respectively fitted with the two outer sides of the sleeve, and connecting holes are provided through the top and bottom surfaces of the connecting fork, and the connecting holes are used to connect the lifting arms, and the side of the connecting fork is provided with a pin anti-rotation device for preventing the pin from rotating relative to it.

[0005] As a preferred technical solution, the pin shaft anti-rotation device includes a limit plate, the limit plate includes an integrally arranged fixed end and a limit end, the fixed end is detachably mounted on the outer side wall of the connecting fork, the limit end includes an upper support arm and a lower support arm arranged opposite to each other up and down, a U-shaped limit slot is formed between the upper support arm and the lower support arm, the upper slot surface of the upper support arm and the lower slot surface of the lower support arm are arranged in parallel, two flat-bottom slots are opened on the pin shaft for use with the upper slot surface and the lower slot surface, the two flat-bottom slots are arranged at an interval of 180°, the thickness of the upper support arm and the lower support arm is equal to the width of the flat-bottom slot, the spacing between the upper slot surface and the lower slot surface is equal to the spacing between the flat bottoms of the two flat-bottom slots, and the depth of the U-shaped limit slot is greater than the diameter of the pin shaft.

[0006] As a preferred technical solution, a through hole is provided at the fixed end, and a threaded blind hole corresponding to the through hole is provided on the outer wall of the connecting fork. A screw passes through the through hole from the outer side of the limiting plate and is threadedly installed in the threaded blind hole, so that the limiting plate is detachably installed on the connecting fork.

[0007] As a preferred technical solution, a protective gasket is installed between the screw head of the screw and the limiting plate.

[0008] As a preferred technical solution, the fixed end of the limit plate is provided with a large arc surface, and the ends of the upper support arm and the lower support arm are respectively provided with small arc surfaces.

[0009] Due to the adoption of the above technical scheme, the upper adjusting screw of the pin-axis anti-rotation articulated lifting rod comprises an upper adjusting screw body, the end of the upper adjusting screw body is fixedly installed with a sleeve, a pin is rotatably installed in the sleeve, and the sleeves are extended from both ends of the pin; the rotating sleeves at both ends of the pin are provided with connecting forks, the inner sides of the two connecting arms of the connecting fork are respectively fitted with the two outer sides of the sleeve, and connecting holes are provided through the top and bottom surfaces of the connecting fork, the connecting holes are used to connect the lifting arm, and the side of the connecting fork is provided with a pin-axis anti-rotation device for preventing the pin from rotating relative to the pin; the beneficial effect of the utility model is that when the lifting arm drives the connecting fork to move, the connecting fork and the pin rotate around the sleeve together, and since the pin-axis anti-rotation device is installed on the side of the connecting fork, there is no relative rotation between the pin and the connecting fork, the friction between the pin and the connecting fork is reduced, the service life of the connecting fork is improved, and even if the force is large, it is not easy to break from the connecting fork, which greatly improves the service life of the adjusting screw on the lifting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0011] Figure 1 It is a structural schematic diagram of the adjusting screw on the pin-shaft anti-rotation hinged lifting rod of the utility model;

[0012] Figure 2 yes Figure 1 A-direction view in the figure;

[0013] Figure 3 The utility model is a schematic structural diagram of a pin shaft anti-rotation device of an adjusting screw rod on a pin shaft anti-rotation hinged lifting rod.

[0014] In the figure: 1-upper adjusting screw body; 2-sleeve; 3-pin; 4-connecting fork; 41-connecting arm; 42-connecting hole; 5-pin anti-rotation device; 51-limiting plate; 511-upper support arm; 512-lower support arm; 513-large arc surface; 514-small arc surface; 515-U-shaped limiting notch; 516-flat bottom notch; 52-screw; 53-protective gasket. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0016] like Figures 1 to 3 As shown in common, the upper adjusting screw of the pin-axis anti-rotation articulated lifting rod comprises an upper adjusting screw body 1, a shaft sleeve 2 is fixedly installed at the end of the upper adjusting screw body 1, a pin shaft 3 is rotatably installed in the shaft sleeve 2, and the shaft sleeve 2 is extended from both ends of the pin shaft 3; a connecting fork 4 is rotatably provided at both ends of the pin shaft 3, and the inner side surfaces of the two connecting arms 41 of the connecting fork 4 are respectively fitted with the two outer side surfaces of the shaft sleeve 2, and a connecting hole 42 is provided through the top and bottom surfaces of the connecting fork 4, and the connecting hole 42 is used to connect the lifting arm, and a pin shaft anti-rotation device 5 is installed on the side of the connecting fork 4 to prevent the pin shaft 3 from rotating relative to it; when the lifting arm drives the connecting fork 4 to move, the connecting fork 4 rotates around the shaft sleeve 2 together with the pin shaft 3, and since the pin shaft anti-rotation device 5 is installed on the side of the connecting fork 4, there is no relative rotation between the pin shaft 3 and the connecting fork 4, which reduces the friction between the pin shaft 3 and the connecting fork 4, and improves the service life of the connecting fork 4. Even if it is subjected to large force, it is not easy to break from the connecting fork 4, which greatly improves the service life of the adjusting screw on the lifting rod.

[0017] like Figure 3As shown, the pin anti-rotation device 5 includes a limit plate 51, which includes a fixed end and a limit end that are integrally arranged. The fixed end is detachably mounted on the outer side wall of the connecting fork 4, and the limit end includes an upper support arm 511 and a lower support arm 512 that are relatively arranged up and down, and a U-shaped limit slot 515 is formed between the upper support arm 511 and the lower support arm 512. The upper slot surface of the upper support arm 511 and the lower slot surface of the lower support arm 512 are arranged in parallel, and two flat-bottom slots 516 that are used in conjunction with the upper slot surface and the lower slot surface are opened on the pin 3. The two flat-bottom slots 516 are arranged at an interval of 180°. The thickness of the upper support arm 511 and the lower support arm 512 is equal to the width of the flat-bottom slot 516, and the spacing between the upper slot surface and the lower slot surface is equal to the spacing between the flat bottoms of the two flat-bottom slots 516. The depth of the U-shaped limit slot 515 is greater than the diameter of the pin 3. After the traditional ball head seat is replaced with the connecting fork 4, it is convenient to install the pin anti-rotation device 5, the limit plate 51 is installed on the outer surface of the connecting fork 4 through the fixed end, and the upper support arm 511 and the lower support arm 512 extend into the two flat bottom notches 516 of the pin 3 to clamp the pin 3 to prevent the pin 3 from rotating, and because the thickness of the upper support arm 511 and the lower support arm 512 is consistent with the width of the flat bottom notch 516, the displacement of the pin 3 is also prevented from the axial direction, playing a double limiting role. The utility model is easy to maintain, ensures the accuracy of the limit, prolongs the service life of the lifting rod, saves production costs, and is conducive to the stable operation of the equipment.

[0018] like Figure 3 As shown, a through hole is provided at the fixed end, and a threaded blind hole corresponding to the through hole is provided on the outer side wall of the connecting fork 4. The screw 52 passes through the through hole from the outer side of the limiting plate 51 and is threadedly installed in the threaded blind hole, so that the limiting plate 51 is detachably installed on the connecting fork 4. A protective gasket 53 is installed between the screw 52 head of the screw 52 and the limiting plate 51. The screw 52 is a relatively common detachable installation method, which is not only convenient for disassembly and assembly but also firmly fixed. The protective gasket 53 can protect the limiting plate 51 during the installation of the screw 52, ​​further extending the service life of the limiting plate 51. The screw 52 is located in the threaded blind hole and does not extend out of the inner side of the connecting fork 4, so that it will not cause interference during use.

[0019] like Figure 3 As shown, the fixed end of the limit plate 51 is provided with a large arc surface 513, and the ends of the upper arm 511 and the lower arm 512 are respectively provided with small arc surfaces 514. The large arc surface 513 and the small arc surface 514 are provided to save materials and to avoid sharp edges and corners that may injure operators.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. The upper adjusting screw of the pin-shaft anti-rotation articulated lifting rod is characterized by: The invention comprises an upper adjusting screw body (1), a shaft sleeve (2) being fixedly mounted at the end of the upper adjusting screw body (1), a pin shaft (3) being rotatably mounted in the shaft sleeve (2), and two ends of the pin shaft (3) extending out of the shaft sleeve (2); connecting forks (4) are rotatably mounted at the two ends of the pin shaft (3), the inner side surfaces of two connecting arms (41) of the connecting fork (4) are respectively fitted with two outer side surfaces of the shaft sleeve (2), a connecting hole (42) is provided through the top and bottom surfaces of the connecting fork (4), and the connecting hole (42) is used to connect a lifting arm; and a pin shaft anti-rotation device (5) for preventing the pin shaft (3) from rotating relative to the connecting fork (4) is installed on the side surface of the connecting fork (4).

2. The upper adjusting screw of the pin-shaft anti-rotation articulated lifting rod according to claim 1, characterized in that: The pin shaft anti-rotation device (5) comprises a limit plate (51), the limit plate (51) comprising an integrally arranged fixed end and a limit end, the fixed end being detachably mounted on the outer side wall of the connecting fork (4), the limit end comprising an upper support arm (511) and a lower support arm (512) arranged opposite to each other up and down, a U-shaped limit notch (515) being formed between the upper support arm (511) and the lower support arm (512), the upper notch surface of the upper support arm (511) and the lower notch surface of the lower support arm (512) being arranged in parallel, The pin shaft (3) is provided with two flat-bottomed notches (516) for use with the upper notch surface and the lower notch surface, the two flat-bottomed notches (516) are arranged 180° apart, the thickness of the upper support arm (511) and the lower support arm (512) is equal to the width of the flat-bottomed notches (516), the spacing between the upper notch surface and the lower notch surface is equal to the spacing between the flat bottoms of the two flat-bottomed notches (516), and the depth of the U-shaped limiting notch (515) is greater than the diameter of the pin shaft (3).

3. The upper adjusting screw of the pin-shaft anti-rotation articulated lifting rod according to claim 2, characterized in that: The fixed end is provided with a through hole, and the outer side wall of the connecting fork (4) is provided with a threaded blind hole corresponding to the through hole. A screw (52) passes through the through hole from the outer side surface of the limiting plate (51) and is threadedly installed in the threaded blind hole, so that the limiting plate (51) is detachably installed on the connecting fork (4).

4. The upper adjusting screw rod of the pin-shaft anti-rotation articulated lifting rod as claimed in claim 3, characterized in that: A protective gasket (53) is installed between the screw (52) head of the screw (52) and the limiting plate (51).

5. The upper adjusting screw of the pin-shaft anti-rotation articulated lifting rod according to any one of claims 2 to 4, characterized in that: The fixed end of the limiting plate (51) is provided with a large arc surface (513), and the ends of the upper support arm (511) and the lower support arm (512) are respectively provided with small arc surfaces (514).

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