Assembly structure and assembly method of power connection device for agricultural machine

Abstract

The present invention relates to an assembly structure and an assembly method of a power connection device for an agricultural machine. The assembly structure comprises: a front frame that is connected to an agricultural machine and towed; a rear frame that is hinge-coupled to the front frame and to the rear of which is connected a working unit; and a double joint that, while inserted in the front and rear frames, has the front end connected to the agricultural machine and the rear end connected to the working unit, and transmits power from the agricultural machine to the working unit. A first mounting hole large enough for the double joint to enter is formed on the front surface of the front frame to which the agricultural machine is connected, a mounting plate having a through-hole, corresponding to the first mounting hole, in the middle is coupled to the front surface of the front frame in front of the first mounting hole, and an input shaft that is coupled and fixed to the front surface of the mounting plate and coupled to the front end of the double joint so as to be able to move in the axial direction but unable to rotate relative thereto is assembled.

Description

Assembly structure and assembly method of power coupling device for agricultural machinery

[0001] The present invention relates to an assembly structure and an assembly method of a power coupling device for agricultural machinery, and more particularly, to an assembly structure and an assembly method of a power coupling device for agricultural machinery that enables a double joint of a power coupling device connecting an agricultural machine such as a tractor and a work machine to be easily installed and removed from the front and rear frames.

[0002] In general, agricultural machinery such as tractors are used to provide power and to tow various agricultural implements, enabling them to perform various agricultural tasks appropriately.

[0003] Between agricultural machinery such as tractors and various work machines, a power connecting device is provided to transmit the power of the agricultural machinery to the work machine.

[0004] In addition, agricultural machinery such as tractors are equipped with a PTO shaft, which is an output shaft that is connected to a power coupling device and provides power to the agricultural machinery, and various types of work machines are equipped with a drive shaft that is connected to a power coupling device and receives power from the agricultural machinery and is driven.

[0005] A conventional power connecting device that connects the PTO shaft of an agricultural machine and the drive shaft of a work machine has been disclosed as a ‘work machine traction link device for a tractor’ in Republic of Korea Public Utility Model No. 20-2009-0007111 (hereinafter referred to as ‘prior art document’).

[0006] The tractor-use work piece traction link device of this prior art document discloses a tractor lower connection group that is connected at two points to both lower links of the tractor, a power input shaft link group in which the tractor lower connection group is fixed at the lower end and a power input spline shaft to which the tractor's power shaft is assembled is assembled, a power output shaft link group in which a power output spline connected to the work piece's drive shaft is assembled, a support leg group hinge-assembled to the lower end of the power output shaft link group, a double yoke universal joint group assembled between the power input shaft link portion and the power output shaft link portion, and a work piece mounting group that is attachable to and detachable from the power output shaft link portion.

[0007] In particular, a double yoke universal joint group is installed and equipped on the inner side between the power input shaft link group and the power output shaft link group, and the power of the agricultural machine is transmitted to the rear work machine by the double yoke universal joint group, thereby enabling the work machine to be driven.

[0008] This double yoke universal joint group is disassembled and maintained through the installation hole at the rear of the power output shaft link group, and after maintenance, it is re-inserted and installed through the installation hole at the rear of the power output shaft link group.

[0009] However, since there is not enough space between the power output shaft link group and the rear work machine, and the double yoke universal joint group is heavy, the work of removing the double yoke universal joint group from the rear of the power output shaft link group, separating it, and inserting it to install it is very difficult and cumbersome due to the narrow space, so the workability of separating and assembling the double yoke universal joint group is low, and as a result, the maintainability of the double yoke universal joint group is low.

[0010]

[0011] (Prior art literature)

[0012] (Patent Document)

[0013] Republic of Korea Public Utility Model No. 20-2009-0007111

[0014] Accordingly, the present invention has been devised to solve the problems of the prior art as described above, and the purpose of the present invention is to provide an assembly structure and assembly method of a power coupling device for agricultural machinery that improves the assembling and maintenance of the power coupling device by easily installing double joints on the front and rear frames of the power coupling device connecting the agricultural machinery and the work machine, thereby enabling assembly and disassembly.

[0015] In order to achieve the above-described object, the present invention provides an assembly structure of a power coupling device for agricultural machinery, comprising: a front frame connected to and towed by an agricultural machinery; a rear frame hingedly connected to the front frame and connected to a workpiece at the rear; and a double joint inserted into the front and rear frames, the front end of which is connected to the agricultural machinery and the rear end of which is connected to the workpiece, and transmitting the power of the agricultural machinery to the workpiece. The assembly structure of the power coupling device for agricultural machinery comprises: a first mounting hole formed on the front of the front frame to which the agricultural machinery is connected, the first mounting hole being sized to allow the double joint to enter and exit; a mounting plate having a through hole corresponding to the first mounting hole at the center thereof is coupled and provided on the front of the front frame in front of the first mounting hole; and an input shaft is assembled on the front of the mounting plate, which is coupled and fixed, and is coupled to the front end of the double joint in a state in which it is movable in the axial direction and cannot rotate relative to the front end.

[0016] And, at the rear of the rear frame to which the work machine is connected, a second mounting hole is formed through which the output shaft of the double joint is rotatably connected via an output shaft bearing, and a flat, straight flat portion is formed on the inner surface of the second mounting hole, and a flat portion corresponding to the flat portion of the second mounting hole is formed on the outer surface of the output shaft bearing that passes through the second mounting hole, so that when the output shaft of the double joint is connected through the second mounting hole of the rear frame, the two flat portions are aligned, so that the double joint can be installed in the correct position within the front and rear frames.

[0017] In addition, a second mounting hole is formed on the rear of the rear frame to which the work machine is connected, into which the output shaft of the double joint is rotatably connected through the output shaft bearing, and a connecting hole cut out to the outside is formed extending on the inner surface of the second mounting hole, and a connecting protrusion that is inserted into and connected to the connecting hole of the second mounting hole is formed protruding on the outer surface of the output shaft bearing that penetrates the second mounting hole, so that when the output shaft of the double joint is connected through the second mounting hole of the rear frame, the connecting protrusion of the output shaft is connected to the connecting groove of the connecting hole, so that the double joint can be provided in a fixed position within the front and rear frames.

[0018] In addition, the double joints provided in the front and rear frames may be provided so that their centers are positioned rearward relative to the hinge centers of the front and rear frames, and so that when the front and rear frames rotate about the hinge, the centers of the double joints do not move forward relative to the hinge centers of the front and rear frames.

[0019] In addition, the method for assembling a power coupling device for agricultural machinery according to the present invention for achieving the above-described purpose is an assembly method for a power coupling device for agricultural machinery assembled with the assembly structure of the power coupling device for agricultural machinery as described above, characterized in that the output shaft of the double joint is inserted into the first mounting hole of the front frame and is inserted into the second mounting hole of the rear frame in a shape-fitting state to be assembled in a fixed position, a mounting plate is fastened to the front of the first mounting hole of the front frame and assembled, and an input shaft is passed through the mounting plate and the first mounting hole of the front frame and is coupled to the double joint in a state in which axial movement is possible but relative rotation is not possible, and the input shaft is fastened to the front of the mounting plate and assembled.

[0020] According to the assembly structure and assembly method of the power coupling device for agricultural machinery of the present invention, the double joints installed in the front and rear frames of the power coupling device connecting the agricultural machinery and the work machine and transmitting the power of the agricultural machinery to the work machine can be simply withdrawn and separated from the front frame, and the maintained double joints can be simply inserted into the front frame for assembly, thereby improving the assembly and maintainability of the power coupling device.

[0021] Figure 1 is a front view of a coupling device for an agricultural machine and a work machine according to the present invention.

[0022] Figure 2 is a rear view of a power coupling device according to the present invention.

[0023] Figure 3 is an exploded view showing the power coupling device according to the present invention from the front.

[0024] Figure 4 is an exploded view showing the power connecting device according to the present invention from the rear.

[0025] Figure 5 is an exploded view showing the joint structure of a double joint configured in a power connecting device according to the present invention.

[0026] FIG. 6a and FIG. 6b are side and plan views showing the positional relationship between the hinge axes of the front and rear frames and the center of the double joint in a straight state of the power connecting device according to the present invention.

[0027] FIG. 7a and FIG. 7b are side and plan views showing the positional relationship between the hinge axes of the front and rear frames and the center of the double joint when the power connecting device according to the present invention is rotated.

[0028] FIG. 8 and FIG. 9 are drawings showing a coupling structure between an output shaft and a rear frame of a power coupling device according to another embodiment of the present invention, wherein FIG. 8 is an exploded view and FIG. 9 is a coupled view.

[0029] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0030] The terms used in the present invention are terms defined in consideration of the functions of the present invention, and since these may vary depending on the intention or custom of the user or operator, the definitions of these terms should be interpreted as meanings and concepts that are consistent with the technical aspects of the present invention.

[0031] In addition, the embodiments of the present invention do not limit the scope of the present invention, but are merely exemplary matters of the components presented in the claims of the present invention, and are embodiments that include components that are included in the technical idea throughout the specification of the present invention and can be replaced as equivalents in the components of the claims.

[0032] Additionally, the optional terms in the examples below are used to distinguish one component from another, and the components are not limited by the terms.

[0033] Accordingly, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention are omitted.

[0034]

[0035] The attached drawings 1 to 9 are drawings showing the assembly structure of a power coupling device for agricultural machinery according to the present invention.

[0036] The power connecting device (100) for agricultural machinery according to the present invention is a power transmission device that transmits the power of an agricultural machinery (not shown) to a working machine (not shown) through an input shaft (440) and an output shaft (460) of a double joint (400), as shown in FIGS. 1 to 4.

[0037] This power connecting device (100) includes, as shown in FIGS. 1 and 2, a front frame (200) that is connected to and towed at the rear end of an agricultural machine, a rear frame (300) that is hinge-joined to the front frame (200) and to which a work machine is connected at the rear, and a double joint (400) (also called a 'double yoke universal joint', but hereinafter referred to as a "double joint") that is inserted into the front and rear frames (200) (300) and has a front end connected to the agricultural machine and a rear end connected to the work machine to transmit the power of the agricultural machine to the work machine.

[0038] First, the front frame (200) is a block of metal plate having a vertical rectangular shape with an open rear side, and includes a front panel (210), two side panels (220) protruding rearward from both sides of the front panel (210), and a connecting panel (230) protruding rearward from the upper and middle portions connecting the two side panels (220), respectively.

[0039] The front panel (210) is a metal plate that constitutes the front of the front frame (200), as shown in FIGS. 3 and 5, and a first mounting hole (211) having a size that allows a double joint (400) to be inserted and removed is formed in the center thereof.

[0040] This first mounting hole (211) has a shape corresponding to the output shaft flange plate (461) formed in the double joint (400) to be described later, and is formed as a square hole having an inner diameter larger than the outer diameter of the output shaft flange plate (461), so that the double joint (400) can be inserted through the first mounting hole (211) of the front panel (210).

[0041] In addition, a sunken groove (212) is formed on the lower side of the first mounting hole (211), and this groove (212) is formed in an arc shape corresponding to a cylindrical connecting yoke (410) formed in the double joint (400), so that when the double joint (400) is inserted into the first mounting hole (211), interference caused by the connecting yoke (410) of the double joint (400) getting caught in the square-shaped first mounting hole (211) is minimized, thereby smoothly inducing the insertion of the double joint (400).

[0042] A plurality of fastening holes (213) for fastening a mounting plate (250) to be described later by bolting it to the front panel (210) around the first mounting hole (211) are formed spaced apart along the circumference of the first mounting hole (211).

[0043] The side panel (220) is composed of a metal plate that protrudes rearward in a perpendicular manner from both sides of the front panel (210) and forms the side of the front frame (200).

[0044] These two side panels (220) are each formed with a stopper (221) protruding outward, and the front surface of the stopper (221) is formed as an inclined surface having an inclination corresponding to the rotation angle of the connecting frame (500) when the connecting frame (500) is rotated, which will be described later, so that when the rotating connecting frame (500) comes into surface contact with the front surface of the stopper (221), the rotation of the connecting frame (500) is stopped when it is rotated to the maximum angle.

[0045] At this time, the front surface of the stopper (221) is formed as an inclined surface corresponding to the rotation angle of the connecting frame (500) and is provided to be in surface contact with the rotating connecting frame (500), so that when the connecting frame (500) and the stopper (221) are in surface contact, the impact caused by the rotational force of the connecting frame (500) is dispersed and absorbed to the front surface of the stopper (221), thereby minimizing the impact force of the stopper (221), thereby preventing damage and breakage of the stopper (221).

[0046] In addition, since the stopper (221) as described above is provided in a state in which the rear mounting panel (241) to be described later protrudes forward of the front panel (210), the size and volume of the stopper (221) can be formed to protrude forward by the protruding distance of the rear mounting panel (241), and the front surface of the stopper (221), that is, the inclined surface, which makes surface contact with the rotating connecting frame (500) can also be formed to have a wider area, thereby improving the durability of the stopper (221).

[0047] The connecting panel (230) is composed of a plurality of metal plates that protrude rearward side by side from the upper and middle portions of the two side panels (220), respectively, while connecting the two side panels (220), as shown in FIGS. 3 and 4.

[0048] A hinge member (231) that is hinge-connected to a connecting panel (330) of a rear frame (300) to be described later is formed on the rear side of the connecting panel (230), and a hinge shaft (260) is connected to the hinge member (231) via a bearing.

[0049] Accordingly, the front and rear frames (200)(300) can be provided to rotate relative to each other based on the hinge axis (260) connected to the hinge portion (231)(331) of the two connecting panels (230)(330).

[0050] Meanwhile, a mounting panel (240) (241) for installing a connecting frame (500) to be described later is configured on the lower part of the front panel (210) of the front frame (200) as described above, that is, on the lower part of the first mounting hole (211) of the front panel (210).

[0051] These mounting panels (240)(241) include a rear mounting panel (241) that is provided to protrude forward from the front panel (210) at the lower side of the first mounting hole (211), as shown in FIGS. 1 and 3, and a front mounting panel (240) that is provided to protrude forward at a predetermined interval from the front of the rear mounting panel (241).

[0052] The front and rear mounting panels (240)(241) are formed of metal plates having shapes corresponding to each other, and a stepped portion (240a)(241a) having a V-shape (∨) and an inverted V-shape (∧) is formed at the upper and lower portions of both mounting panels (240)(241), respectively.

[0053] And, a connecting plate (242)(243) is installed between the upper and lower parts of the two mounting panels (240)(241) so as to connect the upper and lower parts of the two mounting panels (240)(241), respectively, and these connecting plates (242)(243) are formed and provided in shapes corresponding to the upper and lower step portions (240a)(241a) of the two mounting panels (240)(241), respectively.

[0054] In addition, a reinforcing bar (244) is provided on the inclined portion of the connecting plate (242)(243) to reinforce the connecting plate (242)(243), and this reinforcing bar (244) is installed in parallel in the longitudinal direction of the front and rear to connect the front and rear mounting panels (240)(241) on the inclined portion of the connecting plate (242)(243).

[0055] In particular, since the upper connecting plate (242) (243) as described above is provided so as not to exceed the step (240a) (241a) of the mounting panel (240) (241), it is provided in a form that surrounds the first mounting hole (211) at a position lower than the first mounting hole (211) of the front panel (210), and is reinforced by a reinforcing bar (244), so that in the process of inserting the double joint (400) to be described later into the first mounting hole (211) of the front panel (210), the tip of the double joint (400) that has not passed through the first mounting hole (211) can be placed on the upper connecting plate (242), thereby providing a convenient advantage.

[0056] And, as the front end of the double joint (400) is placed on the upper connecting plate (242) and the rear end of the double joint (400) is placed on the connecting panel (230) (330) of the front and rear frames (200) (300), the front end of the double joint (400) is supported at an equal position with the rear end of the double joint (400) that passes through the first mounting hole (211), thereby enabling the assembly process of the power connecting device (100) to be performed smoothly and quickly.

[0057] In addition, a connecting frame (500) in the shape of a “ㄷ” or an inverted “ㄷ” depending on the viewing direction is provided between the front mounting panel (240) and the rear mounting panel (241) provided as described above, and is rotatably connected via a rotation axis, and link connecting portions to which the lower links of the three-point links of the agricultural machine are respectively connected are provided at both ends of the connecting frame (500).

[0058] Meanwhile, the input shaft (440) of the double joint (400) inserted into the first mounting hole (211) must be installed by fastening it with a bolt on the front of the front panel (210). At this time, as the first mounting hole (211) of the front panel (210) is expanded and larger than before, the width from the first mounting hole (211) to the outer periphery of the front panel (210) becomes relatively thinner, and the strength of the front panel (210) becomes weaker overall.

[0059] Accordingly, in the present invention, a mounting plate (250) is provided to firmly install the input shaft (440) of the double joint (400) on the front of the front panel (210).

[0060] This mounting plate (250) is provided to have the same shape as the front panel (210) on the upper side of the mounting panel (240)(241), as shown in FIGS. 1 and 3, and a through hole (251) is formed in the center thereof along the same line as the first mounting hole (211) of the front panel (210) through which the double joint (400) is inserted and removed.

[0061] In particular, the through hole (251) of the mounting plate (250) is formed with a radius corresponding to the distance from the center of the first mounting hole (211) to the groove (212) so that the through hole (251) has a concentric circle that accommodates the remaining area of ​​the first mounting hole (211) excluding the corner portion while having the same center as the first mounting hole (211).

[0062] And, a fastening hole (252) corresponding to the fastening hole (213) of the front panel (210) is formed in the mounting plate (250) around the through hole (251) in the same manner, and both fastening holes (213)(252) are positioned on the same line with the through hole (251) aligned with the groove (212) of the first mounting hole (211).

[0063]

[0064] Meanwhile, as shown in FIGS. 1 and 2, the rear frame (300) is hingedly connected to the rear side of the front frame (200) (i.e., the connecting panel (230)) by a hinge axis (260) so that the front end (i.e., the connecting panel (330) to be described later) can rotate relative to the rear end, and a work piece (not shown) is connected to the rear end to be towed.

[0065] This rear frame (300), as shown in FIGS. 3 and 4, is a block made of a rectangular metal plate corresponding to the front frame (200), and includes a rear panel (310) facing the front panel (210) of the front frame (200), two side panels (320) protruding forward in a orthogonal state on both sides of the rear panel (310), and a plurality of connecting panels (330) protruding forward from the upper and middle portions connecting the two side panels (320).

[0066] The rear panel (310) is a metal plate forming the rear of the rear frame (300), as shown in FIGS. 4 and 5, and a second mounting hole (311) is formed in the center thereof, through which the output shaft (460) and the output shaft bearing (462) of the double joint (400) are provided to protrude and penetrate.

[0067] This second mounting hole (311) is formed as a circular hole corresponding to the output shaft bearing (462) of the double joint (400), so that the output shaft (460) and the output shaft bearing (462) of the double joint (400) are connected through the second mounting hole (311), but the output shaft flange plate (461) of the double joint (400) is provided so as to be caught by contacting the inner surface of the rear panel (310) without passing through the second mounting hole (311).

[0068] In particular, the second mounting hole (311) is provided with a guide means to ensure that the output shaft bearing (462) of the double joint (400) penetrating through it is connected to the correct position.

[0069] As one embodiment of such a guide means, as shown in FIGS. 2 and 4, a flat straight flat portion (312) is formed on the inner surface of the second mounting hole (311) to allow the output shaft (460) penetrating through the second mounting hole (311) to be penetrated and coupled in the correct position, and a flat portion (462a) is formed on the output shaft bearing (462) of the output shaft (460) penetrating through the second mounting hole (311) to be described later so as to be shaped and coupled in line with the flat portion (312) of the second mounting hole (311).

[0070] Accordingly, in the process of installing the output shaft (460) and output shaft bearing (462) of the double joint (400) inserted into the first mounting hole (211) of the front frame (200) by penetrating into the second mounting hole (311) of the rear frame (300), the output shaft bearing (462) and the second mounting hole (311) are shaped and fitted by the flat portion (312) (462a) so that the output shaft bearing (462) is fixedly coupled to the second mounting hole (311), thereby automatically matching the fastening hole of the output shaft flange plate (461) located on the inside of the front and rear frames (200) (300) with the fastening hole (314) of the rear panel (310), thereby making the installation process of the double joint (400) quick and easy.

[0071] And, as another embodiment of the guide means, as shown in FIGS. 8 and 9, a coupling hole (313) cut out from the inner surface to the outer surface of the second mounting hole (311) is formed to extend, and a coupling protrusion (462b) that is inserted into and coupled to the coupling hole (313) of the second mounting hole (311) is formed to protrude on the outer surface of the output shaft bearing (462) to be described later and to be coupled through the second mounting hole (311).

[0072] Accordingly, in the process of installing the output shaft (460) and output shaft bearing (462) of the double joint (400) inserted into the first mounting hole (211) of the front frame (200) through the second mounting hole (311) of the rear frame (300), the engaging projection (462b) of the output shaft bearing (462) is inserted into the engaging hole (313) of the second mounting hole (311), so that the output shaft bearing (462) is fixedly engaged with the second mounting hole (311), and thus the engaging hole of the output shaft flange plate (461) located on the inside of the front and rear frames (200) (300), which will be described later, is automatically aligned with the engaging hole (314) of the rear panel (310), so that the installation process of the double joint (400) is performed quickly and simply.

[0073] A plurality of fastening holes (314) are formed spaced apart along the circumference of the second mounting hole (311) on the rear panel (310) around the second mounting hole (311) as described above, into which the output shaft flange plate (461) is bolted and assembled.

[0074] In addition, the side panel (320) is composed of a metal plate that protrudes forward in a perpendicular state from both sides of the rear panel (310) and constitutes the side of the rear frame (300).

[0075] Between these two side panels (320) and the rear panel (310), as shown in FIGS. 1 and 3, a number of reinforcing brackets (321) are provided to reinforce the rear frame (300) by connecting the rear panel (310) and the two side panels (320).

[0076] In addition, the plurality of connecting panels (330) are composed of a plurality of metal plates that protrude forward in parallel from the upper and middle portions of the two side panels (320) while connecting the two side panels (320), as shown in FIGS. 3 and 4.

[0077] Among the plurality of connecting panels (330), the upper connecting panel (330) and the middle connecting panel (330) are each provided in multiple numbers, and the plurality of connecting panels (330) provided in the upper and middle numbers are provided to overlap the upper connecting panel (230) and the middle connecting panel (230) of the front frame (200) from above and below, respectively.

[0078] In this way, a hinge part (331) having the same size as the hinge part (231) formed in the connecting panel (230) of the front frame (200) is formed in the connecting panel (330) of the rear frame (300) overlapping the connecting panel (230) of the front frame (200), and a hinge axis (260) using a bearing is coupled to both hinge parts (231) (331).

[0079] At this time, the hinge axis (260) is divided into an upper hinge axis and a lower hinge axis and assembled, and the upper hinge axis is coupled to the hinge part (231)(331) of the upper connecting panel (230)(330) of the front and rear frames (200)(300), and the lower hinge axis is coupled to the hinge part (231)(331) of the lower connecting panel (230)(330) of the front and rear frames (200)(300), so that an empty space without the hinge axis (260) is provided between the upper connecting panel and the lower connecting panel, thereby avoiding interference with the double joint (400) inserted into the inside of the first and second connecting panels (230)(330).

[0080] The front and rear frames (200) (300) are provided to rotate relative to the hinge axis (260) by the hinge axis (260) provided in this manner.

[0081]

[0082] Meanwhile, as shown in FIGS. 3 and 4, the double joint (400) is inserted into the inside of the front and rear frames (200) (300), and its front end is connected to the agricultural machine so as to be able to transmit power, and its rear end is connected to the work machine so as to be able to transmit power, thereby transmitting the power of the agricultural machine to the work machine and operating the work machine.

[0083] As illustrated in FIG. 5, this double joint (400) includes an input shaft (440) that is connected to the agricultural machine so as to transmit power, an input yoke (430) that is spline-connected to the input shaft (440), an output shaft (460) that is connected to the work machine so as to transmit power, an output yoke (450) that is spline-connected to the output shaft (460), a connecting yoke (410) that connects the input yoke (430) and the output yoke (450), and a cross bearing (420) that is provided between the input and output yokes (430) (450) and the connecting yoke (410) so as to rotatably connect the input and output yokes (430) (450) and the connecting yoke (410).

[0084] As shown in Fig. 5, the input shaft (440) and the output shaft (460) are provided with respective bearings (442) (462) that surround the outer surface of the input shaft (440) and the output shaft (460), and the outer surface of each bearing (442) (462) is provided with respective flange plates (441) (461).

[0085] At the corner side of each flange plate (441)(461), a fastening hole is formed that matches the fastening hole (252)(314) of the mounting plate (250) and the rear panel (310), so that the input shaft flange plate (441) is bolted and fixed to the mounting plate (250) of the front panel (210) from the outside of the front frame (200), and the output shaft flange plate (461) is bolted and fixed to the inner surface of the rear panel (310) while being inserted into the front and rear frames (200)(300).

[0086] Accordingly, the input shaft (440) and the output shaft (460) are fixed by penetrating the respective mounting holes (211) (311) of the front panel (210) and the rear panel (310) by the respective flange plates (441) (461), and are provided to be rotatable by the respective bearings (442) (462).

[0087] In addition, a flat portion (462a) corresponding to the flat portion (312) formed in the second mounting hole (311) of the rear panel (310) may be formed on the outer surface of the output shaft bearing (462) as shown in FIGS. 2 and 4, or a coupling protrusion (462b) corresponding to the coupling hole (313) of the second mounting hole (311) may be formed to protrude outward on the outer surface of the output shaft bearing (462) as shown in FIGS. 8 and 9.

[0088] Accordingly, when the output shaft bearing (462) is coupled by penetrating into the second mounting hole (311) of the rear panel (310), the flat portions (312) (462a) of the output shaft bearing (462) and the second mounting hole (311) are coupled in a state of being aligned, or the coupling projection (462b) of the output shaft bearing (462) is inserted into the coupling hole (313) of the second mounting hole (311) and coupled, so that the coupling hole of the output shaft flange plate (461) is automatically aligned with the coupling hole (314) of the rear panel (310) and positioned correctly, thereby enabling the double joint (400) inserted into the front and rear frames (200) (300) to be easily assembled.

[0089] In addition, the input shaft (440) and the output shaft (460) as described above are provided with an input yoke (430) and an output yoke (450) spline-joined, respectively, and the input yoke (430) and the output yoke (450) are hinge-joined on both sides of the connecting yoke (410) via a cross bearing (420), so that the input yoke (430) and the output yoke (450) are provided to rotate on the connecting yoke (410) with the cross bearing (420) as an axis.

[0090] In particular, the input yoke (430) and the output yoke (450) are spline-coupled to the input shaft (440) and the output shaft (460), respectively, so that they can move in the axial direction (front and rearward direction) but cannot rotate. However, in the present embodiment, a fixing means such as a spring pin is coupled to the output yoke (450) and the output shaft (460), so that the output yoke (450) and the output shaft (460) are fixed as an integral body that cannot move in the axial direction.

[0091] Accordingly, in this embodiment, the input shaft (440) and the input yoke (430) are spline-coupled, and the input shaft (440) is provided to move forward and backward in the input yoke (430), but the output shaft (460) and the output yoke (450) are fixed by a fixing means in a spline-coupled state, and thus the output shaft (460) is provided to be unable to move forward and backward in the output yoke (450).

[0092] And, as shown in Fig. 5, the connecting yoke (410) is provided with a body portion formed as a hollow cylindrical tube in the center and a pair of yoke portions protruding from both sides of the body portion so as to face each other.

[0093] Among the yoke sections of this connecting yoke (410), an input yoke (430) is rotatably connected to one yoke section via a cross bearing (420), and an output yoke (450) is rotatably connected to the other yoke section via a cross bearing (420).

[0094] Since the connecting yoke (410) is provided at the center of the double joint (400) including the input shaft (440) of the front end and the output shaft (460) of the rear end, the center of the connecting yoke (410) becomes the center of the double joint (400), so that the input and output sections on both sides of the double joint (400) are provided symmetrically with respect to the axis line (illustrated by the thick dashed line in FIGS. 6a to 7b) connecting the centers of the connecting yokes (410) in the vertical direction.

[0095] And, in a state where the double joint (400) is inserted into the front and rear frames (200) (300), the input shaft (440) is fixedly coupled to the front panel (210) of the front frame (200) through the input shaft flange plate (441), and the output shaft (460) is fixedly coupled to the rear panel (310) of the rear frame (300) through the output shaft flange plate (461).

[0096] The double joint (400) provided as described above is provided so as to rotate simultaneously as the front and rear frames (200) (300) rotate on the inside of the front and rear frames (200) (300). In a state where the double joint (400) is positioned in a straight line, the center of the double joint (400) is provided to be positioned rearward (toward the rear panel (310) side) from the center of the hinge axis (260) that hinges the front and rear frames (200) (300), as shown by the dashed line in FIGS. 6A and 6B.

[0097] In this state, when the front and rear frames (200) (300) are rotated based on the hinge axis (260), the center of the double joint (400) is rotated around the front frame (200) in the rear frame (300). As the front frame (200) is rotated, the input shaft (440) and the input yoke (430) in front of the connecting yoke (410) are rotated around the front cross bearing (420) along with the front frame (200), and the connecting yoke (410) is rotated around the rear cross bearing (420) hinge-coupled with the output yoke (450) along the front frame (200).

[0098] Accordingly, when the front and rear frames (200) (300) are rotated based on the hinge axis (260), the center of the connecting yoke (410) moves forward due to the rotation as shown in FIGS. 7a and 7b. At this time, the center of the double joint (400), that is, the center of the connecting yoke (410), is provided so as not to move forward beyond the center of the hinge axis (260). Accordingly, when the double joint (400) is operated in a rotated state, the vibration and noise of the double joint (400) can be minimized to prevent damage, and the high load applied to the hinge axis (260) connecting the front and rear frames (200) (300) can be distributed through the power connecting device (100).

[0099]

[0100] Meanwhile, the assembly method for assembling the power coupling device (100) for agricultural machinery as described above includes inserting the output shaft (460) of the rear end of the double joint (400) into the first mounting hole (211) of the front frame (200) and passing it through the second mounting hole (311) of the rear frame (300) in a shape-fitting manner to assemble it in the correct position, fastening the mounting plate (250) to the front of the first mounting hole (211) of the front frame (200) to assemble it, and passing the input shaft (440) of the front end of the double joint (400) through the mounting plate (250) and the first mounting hole (211) of the front frame (200) to connect it to the double joint (400) in a state in which it can move in the axial direction but cannot rotate relative to it, and fastening the input shaft (440) to the front of the mounting plate (250) to assemble it.

[0101] At this time, the double joint (400) inserted into the first mounting hole (211) of the front frame (200) as described above can be assembled by changing the positions of the input shaft (440) and the output shaft (460) by 180 degrees so that the output shaft (460) is positioned forward and the input shaft (440) is positioned backward. However, in this case, the center of the double joint (400), that is, the center of the connecting yoke (410), is positioned forward of the center of the hinge shaft (260), so that the same purpose and effect as in the present invention cannot be achieved.

[0102]

[0103] The assembly process of the power connecting device for agricultural machinery according to the present invention is described in detail.

[0104] First, a hinge shaft (260) is connected to a hinge member (231) (331) formed on each of the connecting panels (230) (330) of the front and rear frames (200) (300) and installed to overlap each other, so that the front and rear frames (200) (300) are assembled so that they can rotate relative to each other.

[0105] In this state, a double joint (400) is inserted into the first mounting hole (211) formed on the front panel (210) of the front frame (200), and the double joint (400) to be inserted is inserted from the output shaft (460) of the rear end.

[0106] At this time, the input shaft (440) of the tip of the double joint (400) is not assembled, and the output shaft (460) is spline-joined to the output yoke (450) in a state where the output shaft flange plate (461) is coupled to the outside thereof via the output shaft bearing (462) and is fixed to the output yoke (450) by a fixing means such as a spring pin, and is inserted into the first mounting hole (211).

[0107] And, the output shaft (460) and output shaft bearing (462) of the double joint (400) inserted into the first mounting hole (211) are protruded by penetrating through the second mounting hole (311) formed in the rear panel (310) of the rear frame (300).

[0108] In this process, when the flat portion (462a) or the coupling projection (462b) formed on the output shaft bearing (462) is shaped and coupled to the flat portion (312) or the coupling hole (313) formed on the second mounting hole (311), the fastening hole of the output shaft flange plate (461) is automatically aligned with the fastening hole (314) of the rear panel (310), thereby facilitating bolt fastening and improving assembly efficiency.

[0109] Afterwards, a mounting plate (250) is bolted and fixed to the front of the front panel (210) of the front frame (200), but the assembly of the mounting plate (250) may be performed before inserting the double joint (400) into the first mounting hole (211).

[0110] Meanwhile, with the mounting plate (250) assembled on the front of the front panel (210), the input shaft (440) coupled to the input shaft flange plate (441) via the input shaft bearing (442) is spline-coupled to the input yoke (430) through the first mounting hole (211) of the front frame (200).

[0111] Afterwards, the input shaft (440) and the input shaft flange plate (441) are fastened with bolts so that the fastening hole of the input shaft flange plate (441) aligns with the fastening hole (252) of the mounting plate (250), thereby fixing the input shaft (440) and the input shaft flange plate (441) to the front panel (210) of the front frame (200).

[0112] The input shaft (440) assembled as described above rotates together with the front frame (200) when the front frame (200) rotates, and when the input shaft (440) rotates, the input shaft (440) spline-coupled to the input yoke (430) moves in and out of the input yoke (430), and the distance between the input shaft (440) and the input yoke (430) is adjusted and compensated according to the change in distance between the front panel (210) and the rear panel (310) due to rotation.

[0113] And, at this time, when the front frame (200) is rotated in the rear frame (300) based on the hinge axis (260), as shown in FIGS. 7a and 7b, the input shaft (440) and the input yoke (430) are rotated together with the front frame (200) around the front cross bearing (420) of the connecting yoke (410) as an axis, and the connecting yoke (410) is rotated along the front frame (200) around the rear cross bearing (420) with the output yoke (450) as an axis, so that the center of the connecting yoke (410) is located at the rear of the center of the hinge axis (260) as shown in FIGS. 6a and 6b, and then a position change occurs in which it moves forward by rotation.

[0114] At this time, even when the front frame (200) is rotated to the maximum, the center of the double joint (400), that is, the center of the connecting yoke (410), is arranged so as not to exceed the center of the hinge axis (260), so that when the double joint (400) is operated, the vibration and noise of the double joint (400) can be minimized to prevent damage, and the high load applied to the hinge axis (260) connecting the front and rear frames (200) (300) can be distributed through the power connecting device (100).

[0115] That is, when the agricultural machine is in operation, the possibility of damage to the double joint (400) is higher when the front and rear frames (200) (300) are rotated than when in a straight line. However, when the double joint (400) is rotated, the center of the double joint (400) does not exceed the center of the hinge axis (260) connecting the front and rear frames (200) (300), so that the bending of the double joint (400) is gentle, thereby preventing damage to the double joint (400).

[0116]

[0117] Although the present invention has been described in detail through specific examples, this is intended to specifically explain the present invention, and the present invention is not limited thereto, and it is clear that modifications and improvements can be made by those skilled in the art within the technical spirit of the present invention.

[0118] All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

[0119]

[0120] (Explanation of symbols)

[0121] 100: Connector 200: Front Frame

[0122] 210: Front panel 211: First mounting hole

[0123] 212: Home 213: Fastener

[0124] 220: Side panel 221: Stopper

[0125] 230: Connection panel 231: Hinge

[0126] 240,241: Mounting panel 240a,241a: Step part

[0127] 242,243: Connecting plate 244: Reinforcing bar

[0128] 250: Mounting plate 251: Through hole

[0129] 252: Fastener 260: Hinge shaft

[0130] 300: Rear frame 310: Rear panel

[0131] 311: Second mounting hole 312: Flat part

[0132] 313: Joint 314: Fastener

[0133] 320: Side panel 321: Reinforcement bracket

[0134] 330: Connection panel 331: Hinge

[0135] 400: Double joint 410: Connecting yoke

[0136] 420: Cross bearing 430: Input yoke

[0137] 440: Input shaft 441: Input shaft flange plate

[0138] 442: Input shaft bearing 450: Output yoke

[0139] 460: Output shaft 461: Output shaft flange plate

[0140] 462: Output shaft bearing 462a: Flat part

[0141] 462b: connecting projection 500: connecting frame

Claims

1. An assembly structure of a power coupling device for agricultural machinery, including a front frame connected to and towed by an agricultural machine, a rear frame hingedly connected to the front frame and connected to a work machine at the rear, and a double joint inserted into the front and rear frames, the front end of which is connected to the agricultural machine and the rear end of which is connected to the work machine to transmit the power of the agricultural machine to the work machine. A first mounting hole of a size that allows a double joint to enter is formed on the front of the front frame to which the agricultural machinery is connected. A mounting plate having a through hole corresponding to the first mounting hole is provided in the center of the front frame in front of the first mounting hole. An assembly structure of a power coupling device for agricultural machinery, in which an input shaft is assembled to the front end of a double joint in a state in which it is fixedly coupled to the front of the mounting plate and is axially movable but cannot rotate relative to the front end.

2. In claim 1, At the rear of the rear frame to which the work machine is connected, a second mounting hole is formed through which the output shaft of the double joint is rotatably connected via the output shaft bearing. A flat, straight flat surface is formed on the inner surface of the second mounting hole. On the outer surface of the output shaft bearing that penetrates the second mounting hole, a flat portion corresponding to the flat portion of the second mounting hole is formed. An assembly structure of a power coupling device for agricultural machinery, which enables the double joint to be installed in a fixed position within the front and rear frames by matching the two flat portions when the output shaft of the double joint is penetrated and connected to the second mounting hole of the rear frame.

3. In claim 1, At the rear of the rear frame to which the work machine is connected, a second mounting hole is formed through which the output shaft of the double joint is rotatably connected via the output shaft bearing. On the inner surface of the second mounting hole, an externally cut joint is formed extending outward. On the outer surface of the output shaft bearing that penetrates the second mounting hole, a coupling projection is formed protruding to be inserted into and coupled to the coupling hole of the second mounting hole. An assembly structure of a power coupling device for agricultural machinery, which enables the double joint to be installed in a fixed position within the front and rear frames by having the coupling projection of the output shaft engage with the coupling groove of the mounting hole when the output shaft of the double joint is penetrated and engaged with the second mounting hole of the rear frame.

4. In claim 1, An assembly structure of a power connecting device for agricultural machinery, wherein a double joint provided within a front and rear frame has its center positioned rearward relative to the hinge center of the front and rear frames, and is provided so that when the front and rear frames rotate about the hinge, the center of the double joint does not move forward relative to the hinge center of the front and rear frames.

5. A method for assembling a power coupling device for agricultural machinery assembled with the assembly structure of the power coupling device for agricultural machinery of claim 2 or claim 3, Insert the output shaft of the double joint into the first mounting hole of the front frame and assemble it in the correct position by passing it through the second mounting hole of the rear frame in a shape-fitting manner. Assemble by attaching the mounting plate to the front of the first mounting hole of the front frame. A method for assembling a power coupling device for agricultural machinery, wherein the input shaft is inserted through the first mounting hole of the mounting plate and the front frame, and the input shaft is connected to the front of the mounting plate so that it can move axially but cannot rotate relative to the double joint.

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