JP2012187023A - Power transmission apparatus of tending working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission apparatus of a tending working machine that extends a distance in the progress direction between a drive shaft arranged on a mounting frame body ahead in the progress direction and a driven shaft at the side of a machine casing body, to that extent, reduce the expansion amount of a transmission shaft, smoothly performs swing actions in the right and left directions of the transmission shaft by the movement in the right and left directions of the machine casing body, smoothly performs the right and left movements of the machine casing body, reduces the folding angle of an universal coupling, smoothly performs power transmission and improves levee-shaping workability.SOLUTION: The transmission shaft 13f of a power transmission mechanism 13 having swing action in the right and left directions B by the right and left movements of the machine casing body 4 is arranged on an interference avoidance position D to be an upper position of a tending working mechanism 7.

Description

  The present invention relates to a power transmission device for a management work machine such as, for example, a straightening machine that performs a work for creating or repairing a firewood or a mowing work machine for performing a mowing work for a firewood.

  Conventionally, as a sorter of this type, a mounting frame is connected to a traveling machine body by a connecting mechanism, and the machine frame body is movable to the mounting frame body in the left-right direction perpendicular to the traveling direction of the traveling machine body by a movement guide mechanism. Provided with a moving mechanism for moving the machine frame in the left-right direction, a trimming mechanism provided in the machine frame, a drive shaft using the traveling machine as a drive source in the mounting frame, and a machine frame Is provided with a driven shaft serving as a drive source for the trimming mechanism, and a power transmission mechanism comprising a pair of front and rear universal joints allowing the horizontal movement of the machine frame body between the driven shaft and the driven shaft. The thing of the structure formed is known.

  Further, as the trimming mechanism, a main trimming mechanism Q and a secondary trimming mechanism H are arranged at both rearward positions in the traveling direction of the traveling machine body, and the traveling machine body S is illustrated in the field M as shown in FIG. While traveling counterclockwise in the direction of the arrow, the main trimming mechanism Q at one side of the traveling machine body performs the trimming work and inevitably extends from the front of the traveling machine body S to the work site of the main trimming mechanism Q. The remaining unaligned portion T is traveled on the traveling machine body S in the clockwise direction opposite to the direction of the arrow, and the sub-alignment mechanism H performs the alignment operation.

JP2002-325502 Patent No. 4096275 Japanese Utility Model Sho 60-119210

  However, in the case of the conventional structure, the main grading mechanism and the secondary grading mechanism are each provided with a banking rotor for splashing mud on the old ridge, a rotary grading body capable of rotating and grading the ridge surface, and a drive system, respectively. As a result, the entire structure is easily complicated, is easily increased in size and weight, has a disadvantage that safety considerations are particularly required, and traveling stability may be hindered.

  The present invention is intended to solve these disadvantages. Among the present inventions, the invention according to claim 1 connects the mounting frame body to the traveling machine body by a connecting mechanism, and the machine is connected to the mounting frame body. A moving mechanism is provided for moving the frame body in the left-right direction with respect to the traveling direction of the traveling machine body, a management work mechanism is disposed on the machine frame body, and a drive shaft having the traveling machine body as a drive source is provided on the mounting frame body A driven shaft serving as a drive source for the management work mechanism is provided on the machine frame body, and the horizontal movement of the machine frame body is allowed between the drive shaft and the driven shaft. A power transmission mechanism comprising a pair of front and rear universal joints and a telescopic transmission shaft. The power transmission of the management machine characterized by being arranged at an interference avoidance position above the mechanism Apparatus is in.

  The invention according to claim 2 is characterized in that the machine frame is provided on the mounting frame so as to be movable in the left-right direction perpendicular to the traveling direction of the traveling machine by a movement guide mechanism. Further, the invention according to claim 3 is characterized in that the interference avoidance position is an upper position of the management work mechanism and the machine frame body, the driven shaft is connected to the machine frame body, and the transmission shaft is the machine frame. The invention is characterized in that it is disposed at a position where it crosses over the body, and the invention according to claim 4 is driven by the power take-off shaft of the traveling machine body on the mounting frame body. A power transmission shaft is disposed, and a front transmission mechanism is interposed between the power shaft and the drive shaft, and the invention according to claim 5 is characterized in that: An input shaft is disposed below the driven shaft of the frame, and a rear transmission is provided between the input shaft and the driven shaft. And it is characterized in that formed by interposing a mechanism.

  As described above, according to the first aspect of the present invention, the transmission shaft of the power transmission mechanism that swings in the left-right direction by the left-right movement of the machine casing is set to the upper position of the management work mechanism. Since it is disposed at the interference avoidance position, it is possible to increase the distance in the traveling direction between the drive shaft disposed in the mounting frame body ahead of the traveling direction and the driven shaft on the machine frame side. The amount of expansion and contraction can be reduced, the horizontal movement of the transmission shaft can be smoothly performed by the horizontal movement of the machine frame body, the horizontal movement of the machine frame body can be performed smoothly, and freely The bending angle of the joint can also be reduced, power transmission can be performed smoothly, and the work efficiency can be improved.

  In the invention according to claim 2, since the machine frame body is provided on the mounting frame body so as to be movable in the left-right direction perpendicular to the traveling direction of the traveling machine body by a movement guide mechanism. The machine frame body can be smoothly moved left and right by the guide mechanism, and in the invention according to claim 3, the interference avoidance position is an upper position of the management work mechanism and the machine frame body, Since the driven shaft is disposed on the machine frame body at a position where the transmission shaft extends over the machine frame body, there is no hindrance to the horizontal movement of the machine frame body. The flexibility of the arrangement of the components constituting the management work mechanism arranged in the machine frame body can be increased. In the invention according to claim 4, the traveling frame body is attached to the mounting frame body. A power shaft driven by the power take-off shaft is arranged, and the power shaft and the above drive The power transmission structure from the traveling machine body to the management work mechanism can be simplified, and the invention according to claim 5 provides the above machine. Since the input shaft is disposed below the driven shaft on the frame body and a rear transmission mechanism is interposed between the input shaft and the driven shaft, power transmission from the traveling machine body to the management work mechanism The structure can be simplified.

1 is an overall side view of an embodiment of the present invention. It is a whole side sectional view of an example of an embodiment of the invention. 1 is an overall plan view of an embodiment of the present invention. 1 is an overall rear view of an embodiment of the present invention. It is the whole back sectional view of an example of an embodiment of the invention. 1 is an overall cross-sectional view of an embodiment of the present invention. It is a partial expanded sectional view of the example of an embodiment of the invention. It is a whole top view of the working state of the embodiment of the present invention. It is a whole rear view of the working state of the embodiment of the present invention. It is whole rear sectional drawing of the working state of the embodiment of this invention. It is a partial expanded side sectional view of an example of an embodiment of the invention. It is a whole top view of the working state of the embodiment of the present invention. It is a whole rear view of the working state of the embodiment of the present invention. It is whole rear sectional drawing of the working state of the embodiment of this invention. It is an explanatory plan view of the trimming work.

  1 to 14 show an embodiment in which the present invention is applied to a rectifier. As shown in FIGS. 1 and 2, reference numeral 1 denotes a traveling machine body. In this case, a tractor is used, and the rear part of the traveling machine body 1 is used. The attachment frame body 3 is connected to be vertically movable by a three-point link type connection mechanism 2. In this case, the mounting frame 3 is formed in a substantially T shape as a whole consisting of the horizontal flange 3a and the central vertical flange 3b, and the connecting mechanism 2 includes a pair of left and right lower links 2a and 2a, an upper link 2b, and a traveling machine body 1. It is composed of a pair of left and right swing links 2c and 2c and suspended links 2d and 2d that swing vertically. The lower links 2a and 2a and the upper link 2b are pivoted between the traveling machine body 1 and the mounting frame 3. The mounting frame 3 is configured to move up and down through the suspension links 2d and 2d by swinging the pair of left and right swing links 2c and 2c.

  Reference numeral 4 denotes a machine frame body. As shown in FIGS. 2, 3 and 4, the machine frame body 4 is moved to the mounting frame body 3 by the movement guide mechanism 5 in the left-right direction B perpendicular to the traveling direction of the traveling machine body 1. And a moving mechanism 6 for moving the machine frame 4 in the left-right direction B is provided. In this case, a pair of left and right support arms 3c and 3c are rearwardly attached to the horizontal flange 3a of the mounting frame 3. A rectangular frame-shaped guide frame 5c composed of upper and lower guide rods 5a and 5a and left and right vertical rods 5b and 5b is attached to the support arms 3c and 3c. A pair of upper and lower guide rolls 5d and 5d are provided on the left and right sides, and the machine frame 4 is provided so as to be movable in the left and right direction B by sliding fitting between the guide rods 5a and 5a and the guide rolls 5d and 5d. The motor 6a for operation is attached to the machine frame 4, and the machine frame 4 is fitted with bearings 6b and 6b. The moving shaft 6c is rotatably installed with the axis line in the traveling direction, the main shaft of the operating motor 6a and the operating shaft 6c are connected by a joint 6d, the moving gear 6e is attached to the operating shaft 6c, and the guide frame 5c is attached. A rack tooth body 6f is attached, and the operation motor 6a is rotated forward and backward to move the machine frame body 4 in the left-right direction B by meshing between the moving gear 6e and the rack tooth body 6f.

Reference numeral 7 denotes a leveling machine as a management work mechanism, which is provided in the machine frame body 4 and is roughly divided into a jumping rotary body 8 and leveling bodies 10 and 10. In this case, as shown in FIG. The machine frame 4 is provided with a jumping rotary body 8 that rotates in one direction N around the rotation axis O in the traveling direction of the traveling machine body 1 and can jump the mud in the field M, and is positioned above the jumping rotary body 8. A discharge position changing mechanism 9 capable of selectively discharging the mud that is lifted up by rotation in one direction N on the ridge W at one side position R or the other side position L is provided. of which the upper surface W ₁ and on the other hand side W ₂ of the rear position whereas lateral position R or ridge W of the other lateral position L configured by providing a Seiaze possible pair of Seiaze body 10, 10.

  In this case, as shown in FIGS. 5 and 6, the jumping rotary body 8 has a plurality of jumper blades 8b protruding from the outer peripheral surface of the rotor body 8a. 1 has a structure that rotates in one direction N around the rotation axis O in the traveling direction 1 and jumps up the mud in the field M, and the discharge position changing mechanism 9 is as shown in FIGS. The machine frame 4 has a substantially rectangular tube shape with a bottom surface formed by an upper plate 11a, a front plate 11b, a rear plate 11c, and side plates 11d and 11d covering the upper position, the front-rear position, and both side positions of the jumping rotary body 8. The fixed cover member 11 is attached. In this case, the fixed cover member 11 is composed of a pair of left and right half-cover bodies 11e and 11e which are divided and formed. 11f is provided so that it can be retracted up and down freely. The bearing cylinder part 4a is installed horizontally in the advancing direction, the drive main shaft 4b is supported on the bearing cylinder part 4a, and the rotating ring 12a formed on the movable cover member 12 on the outer peripheral surface of the bearing cylinder part 4a is rotatable. As shown in FIG. 2, the movable cover member 12 has a semicircular arc-shaped upper plate 12b that covers the upper position, the front-rear position, and both side positions of the jumping rotary body 8, an edge plate-shaped front plate 12c, and a rear plate 12d. The turning gear 9a is attached to the operating shaft 6c, the arcuate rack tooth body 9b is attached to the movable cover member 12, and the operating motor 6a is rotated forward and backward to turn the turning gear 9a and the arcuate rack tooth body 9b. The machine frame 4 is configured to rotate forward and backward by meshing with the above.

  When the operating shaft 6c is rotated by the operating motor 6a of the discharge position changing mechanism 9, the movable cover member 12 rotates counterclockwise as shown in FIGS. K is formed, and the mud that is spun up by the rotation in one direction N of the jumping rotary body 8 is discharged and guided as it is onto the ridge W at one side position R through the opening K on one side. When the operating shaft 6c is reversely rotated by the operating motor 6a, as shown in FIGS. 5 to 14, the movable cover member 12 rotates clockwise, the opening K on one side is closed, and the opening on the other side is closed. The mud that is formed by F and is flipped up by the rotation in one direction N of the jumping rotary body 8 passes through the upper part of the movable cover member 12 and then passes through the opening F on the other side, The release will be guided upward.

Further, in this case, the pair of right and left Seiaze 10, 10 are formed symmetrically to each other, as shown in FIG. 4, respectively, Seiaze possible top Seiaze portion 10a and ridges the upper surface W ₁ of the ridge W one side W ₂ of W consists Seiaze possible side Seiaze portion 10b, the upper surface Seiaze portion 10a and side Seiaze portion 10b, respectively, a plurality of clamping surface G · the outer peripheral surface of the rotor frame 10c And a pressing plate body E having a length reaching the pressing surface portion G at the rearward position in the rotational direction adjacent to each pressing surface portion G is disposed, and the pressing plate body E has flexibility. It is formed of a flexible plate made of a material that can be elastically bent by an external load made of a synthetic resin such as nylon resin or vinyl chloride resin, or a metal such as stainless steel or spring steel.

  In this case, as shown in FIG. 2 and FIG. 4, a bearing cylinder portion 4a is provided at the lower part of the machine frame 4 by the vertical members 4c and 4c, and the drive main shaft 4b is supported by the bearing cylinder portion 4a. The support drive shafts 4d and 4d, which are integral or separate from the rear portion, are horizontally provided in the left-right direction B perpendicular to the traveling direction of the traveling machine body 1, and a gear mechanism 4e is provided between the drive main shaft 4b and the support drive shaft 4d. The left and right ends of the support drive shafts 4d and 4d are attached to a pair of left and right trimming bodies 10 and 10, and the driving main shaft 4b is rotated in one direction N via the power transmission mechanism 13 using the traveling machine body 1 as a drive source. The upper rotating body 8 and the pair of left and right trimming bodies 10, 10 are configured to rotate in one direction C in the direction of the arrow in FIG.

  In this case, as shown in FIGS. 2 and 3, a bracket 3d is attached to the upper portion of the central vertical flange 3b of the mounting frame 3, and a drive shaft 13a using the traveling machine body 1 as a drive source is disposed on the bracket 3d by a bearing 13b. The driven shaft 13c as a drive source of the management work mechanism 7 is disposed on the machine frame 4 by the bearing 13d, and the movement of the machine frame 4 in the left-right direction B is allowed between the drive shaft 13a and the driven shaft 13c. And a power transmission mechanism 13 comprising a pair of front and rear universal joints 13e and 13e and a telescopic transmission shaft 13f. The transmission shaft 13f is slidably fitted in a non-rotating state with respect to each other. The transmission shaft 13f of the power transmission mechanism 13 which includes an outer cylindrical body 13g having a hole and a hexagonal rod-shaped inner casing 13h and swings in the left-right direction B by the left-right movement of the machine frame 4 is managed as described above. Above mechanism 7 In this case, the interference avoidance position D is a position above the management work mechanism 7 and the machine casing 4 and a rear position in the traveling direction of the machine casing 4. Thus, the driven shaft 13c is disposed at a position where the transmission shaft 13f extends over the machine frame 4.

  In this case, as shown in FIGS. 2 and 3, a power shaft 14a driven by the power take-off shaft 1a of the traveling machine body 1 through the universal joint mechanism 1b is disposed on the horizontal flange portion 3a of the mounting frame 3. An intermediate shaft 14c is disposed in the central vertical flange 3b of the mounting frame 3, and a pair of turning gears 14d and 14e are disposed between the power shaft 14a and the intermediate shaft 14c. And the drive shaft 13a, a front transmission mechanism 14 comprising a chain 14b is interposed, and an input shaft 15a is disposed on the machine frame 4 below the driven shaft 13c. The shaft 15a and the drive main shaft 4b have a direct connection structure, and a rear transmission mechanism 15 including a chain 15b is interposed between the input shaft 15a and the driven shaft 13c.

Reference numeral 16 denotes a pretreatment mechanism, which is provided at a forward position in the moving direction of the jumping rotary body 8 as shown in FIG. 6. In this case, the base portion of the chain case 16a is positioned at one side position at the front portion of the bearing cylinder portion 4a. A pretreatment rotor 16c having a plurality of pretreatment blades 16b is rotatably provided at the front portion of the chain case 16a so as to be able to swing up and down toward the flange W of the R, and the chain case 16a is formed by a chain member 16d. A chain mechanism 16e is interposed between the rotor shaft 16f of the pretreatment rotor 16c and the drive main shaft 4b, and the rotation direction of the pretreatment rotor 16c and the jumping rotator 8 is determined by the chain mechanism 16e. In order to set in a different direction and improve the binding property between the old paddle and the embankment, the upper surface W1 of the paddle W at the _one side position R is scraped in advance by the rotation of the pretreatment rotor 16c.

Since this embodiment is configured as described above, as shown in FIG. 8 to FIG. 11, the slide between the guide rods 5a and 5a and the guide rolls 5d and 5d of the movement guide mechanism 5 by driving the operation motor 6a of the movement mechanism 6. The machine frame 4 is moved to the right position in FIG. 9 as one side position R by fitting, and in this state, the traveling machine body 1 travels along the old ridge in the counterclockwise direction of the arrow in FIG. When the power take-off shaft 1a of the traveling machine body 1 is rotated, the drive shaft 13a disposed on the mounting frame body 3, the driven shaft 13c disposed on the machine frame body 4, a pair of front and rear universal joints 13e and 13e, and The rectifying mechanism as the management work mechanism 7 is driven via the power transmission mechanism 13 including the telescopic transmission shaft 13 f, and the upper surface of the ridge W at one side position R by the rotation of the pretreatment rotor 16 c of the pretreatment mechanism 16. W ₁ is cut off and the discharge position changing mechanism 9 The opening K is opened by the rotation of the movable cover member 12, and the mud of the farm field M that is flipped up by the rotation in one direction N of the jumping rotary body 8 is released as it is onto the ridge W at one side position R, Of the pair of left and right trimming bodies 10, 10 arranged at the rear position of the jumping rotary body 8, the trimming body 10 at one side position R is an upper surface W ₁ and one side surface of the collar W at one side position R. rotates in contact with the W ₂ rotates Seiaze the top W ₁ and on the other hand side W ₂ of the ridge W, the other Seiaze body 10 receives a Seiaze reaction force to沈入the field M, the traveling of the traveling body 1 By increasing the rotational speed of the trimming body 10 with respect to the speed, the trimming body 10 can be in sliding contact with the heel W surface, and the heel W surface can be tightened smoothly and firmly by the rotational sliding contact. As a result, the trimming operation is performed leaving the unaligned processing portions T at the four corners of the collar W shown in FIG. The

Next, when trimming the unordered processing portion T, as shown in FIGS. 12 to 14, the frame 4 is set to the other side position L by driving the operating motor 6a of the moving mechanism 6 in FIG. Move to the left position, and in this state, the traveling machine body 1 travels along the old shaft in the clockwise direction opposite to the direction of the arrow in FIG. 15, and the power take-off shaft 1a of the traveling machine body 1 is rotated to release it. The opening K on one side is closed by the rotation of the movable cover member 12 of the position changing mechanism 9 to form the opening F on the other side, and is flipped up by rotation in one direction N of the jumping rotary body 8. The mud soil in the farm field M is guided to be discharged through the upper portion of the movable cover member 12 and through the opening F on the other side onto the ridge W at the other side position L, and is arranged at the rear position of the jumping rotary body 8. Of the pair of left and right trimming bodies 10, 10, the trimming body 10 at the other side position L is Top W ₁ and whereas the ridge W of rectangular lateral position L to rotate in contact with the side surface W ₂ of the upper surface W ₁ and on the other hand side W ₂ of the ridge W rotates Seiaze with, thereby non Seiaze processing portion shown in FIG. 15 T trimming work will be performed.

  Accordingly, the machine frame body 4 is moved by the moving mechanism 6 in the left-right direction B orthogonal to the traveling direction of the traveling machine body 1, and the discharge position turning mechanism 9 is flipped up by rotation of the jumping rotary body 8 in one direction N. A pair of left and right trimming bodies 10, arranged at the rear position of the jumping rotator 8, can be selectively discharged and guided on the ridge W at one side position R or the other side position L. Any one of the trimming bodies 10 can trim the collar W at the one side position R or the other side position L, and can easily perform the trimming work without leaving the unsorted processing portion T. Can do.

  In this case, the machine frame 4 is provided on the mounting frame 3 by the movement guide mechanism 5 so as to be movable in the left-right direction B orthogonal to the traveling direction of the traveling machine 1. The body 4 can be smoothly moved left and right.

  At this time, the transmission shaft 13c of the power transmission mechanism 13 that swings in the left-right direction B due to the left-right movement of the machine casing 4 is disposed at the interference avoidance position D, which is the upper position of the management work mechanism 7. Therefore, the distance in the traveling direction between the drive shaft 13a disposed on the front mounting frame 3 in the traveling direction and the driven shaft 13c on the machine frame 4 side can be increased, and the amount of expansion / contraction of the transmission shaft 13f is accordingly increased. That is, the sliding amount of the outer cylinder 13g and the inner casing 13h can be reduced, and the swinging motion θ in the left-right direction B of the transmission shaft 13f by the movement of the machine frame 4 in the left-right direction B is smoothly performed. The frame 4 can be moved smoothly from side to side, the bending angle of the universal joints 13e and 13e can be reduced, the power can be transmitted smoothly, and the workability can be improved. Can do.

Further, in this case, the interference avoidance position D is a position above the management work mechanism 7 and the machine casing 4, the driven shaft 13 c is connected to the machine casing 4, and the transmission shaft 13 f is connected to the machine casing 4. Since it is disposed at a position where it crosses over, it does not hinder the horizontal movement of the machine frame body 4 and constitutes a management work mechanism 7 disposed in the machine frame body 4. The flexibility of arrangement of components such as the jumping rotary body 8 can be increased. In this case, a power shaft 14a driven by the power take-off shaft 1a of the traveling machine body 1 is disposed on the mounting frame 3. In addition, since the front transmission mechanism 14 is interposed between the power shaft 14a and the drive shaft 13a, the power transmission structure from the traveling machine body 1 to the adjusting mechanism as the management work mechanism 7 is simplified. In this case, the machine body 4 is provided below the driven shaft 13c. Since the input shaft 15a is disposed and the rear transmission mechanism 15 is interposed between the input shaft 15a and the driven shaft 13c, the power transmission structure from the traveling machine body 1 to the management work mechanism 7 is simplified. can be of, also in this case, the pair of right and left Seiaze 10, 10 are formed symmetrically to each other, respectively, the upper surface W ₁ of the ridge W Seiaze possible top Seiaze portion 10a and since one side W ₂ of the ridge W consisting Seiaze possible side Seiaze portion 10b, it can be pressed reliably tighten the ridge W.

  The present invention is not limited to the above-described embodiment. For example, the above-described embodiment is applied to a straightener, but other management work machines include a mowing work machine, a field grooving machine, and the like. It can also be applied to working machines, fertilizer working machines, chemical spraying machines, seeding machines, etc. In this case, a mowing rotor or the like will be used instead of the jumping rotary body and the trimming body, for example, the above As a moving mechanism, a structure in which a hydraulic pump is driven by a driving source of the traveling machine body 1, a hydraulic cylinder is driven by the hydraulic pump, and the machine frame body 4 is moved left and right by the hydraulic cylinder, or an electric drive of the traveling machine body 1 is used. It is possible to adopt a structure in which the machine frame body 4 is directly moved left and right by an electric cylinder that is electrically controlled using a power source, or a manual structure using a lead screw structure that is rotated by a handle. Also, travel guidance As the structure 5, a parallel link mechanism including a pair of left and right horizontal links or another link structure can be adopted. In addition, the mounting frame 3, the movement guide mechanism 5, the movement mechanism 6, and the management work The type of the mechanism 7, the structure and shape of the jumping rotary body 8, the discharge position changing mechanism 9, and the trimming body 10 are designed with appropriate changes.

  As described above, the intended purpose can be sufficiently achieved.

D Interference avoidance position B Left-right direction θ Swing operation 1 Traveling machine body 1a Power take-off shaft 2 Connection mechanism 3 Mounting frame body 4 Machine frame body 5 Movement guide mechanism 6 Movement mechanism 7 Management work mechanism 13 Power transmission mechanism 13a Drive shaft 13c Drive shaft 13e Universal joint 13f Transmission shaft 14 Front transmission mechanism 14a Power shaft 15 Rear transmission mechanism 15a Input shaft

Claims (5)

  A mounting mechanism is connected to the traveling machine body by a coupling mechanism, and a moving mechanism is provided in the mounting frame body to move the machine frame body in the left-right direction with respect to the traveling direction of the traveling machine body. A drive shaft having the traveling machine body as a drive source is disposed on the mounting frame body, a driven shaft serving as a drive source for the management work mechanism is disposed on the machine frame body, and the drive shaft and the A left and right movement of the machine frame body is provided with a power transmission mechanism comprising a pair of front and rear universal joints and an extendable transmission shaft for allowing the machine frame body to move in the left and right direction between the driven shaft and the driven shaft. A power transmission device for a management work machine, wherein the transmission shaft of the power transmission mechanism that swings in the left-right direction is disposed at an interference avoidance position that is located above the management work mechanism.   2. The power transmission of a management work machine according to claim 1, wherein said machine frame body is provided on said mounting frame body so as to be movable in a left-right direction orthogonal to a traveling direction of said traveling machine body by a movement guide mechanism. apparatus.   The interference avoidance position is an upper position of the management work mechanism and the machine frame body, and the driven shaft is disposed on the machine frame body at a position where the transmission shaft extends over the machine frame body. The power transmission device for a management work machine according to claim 1 or 2, wherein the power transmission device is used.   A power shaft driven by a power take-off shaft of the traveling machine body is disposed on the mounting frame body, and a front transmission mechanism is interposed between the power shaft and the drive shaft. Item 4. The power transmission device for a management work machine according to any one of Items 1 to 3.   An input shaft is disposed below the driven shaft on the machine frame body, and a rear transmission mechanism is interposed between the input shaft and the driven shaft. 5. The power transmission device for a management work machine according to any one of 4 above.