JP5943629B2 - Power transmission device in twin rake - Google Patents

Description

  The present invention relates to a twin rake that gathers grass and rice straw that have been cut down in a field in a streaky manner by a pair of rotors symmetrically provided to the left and right, and that the right and left rotors are driven and connected to the twin rakes. The present invention relates to an improvement of a power transmission device in a twin rake for driving a mounted baler or harvester.

  A twin rake used to collect pastures and rice straws that have been cut down and left in the field in rows, improves the work efficiency of harvesters such as roll balers and harvesters that collect and process grass and rice straw. In order to improve, it is a work machine used as a pre-work of the work by the harvester, and is usually attached to the connecting hitch t of the tractor T mounted on the front end side as shown in the plan view of FIG. 1 and the side view of FIG. The assembly machine frame 10 to be assembled with the main frame 11 extending long backward from the assembly machine frame 10, and the support machine frame 13 of the traveling wheel 12 provided at the rear end of the main frame 11, In the plan view, a substantially T-shaped main body frame 1 that is long in the front-rear direction is formed, and left and right side portions of the main body frame 1 in the middle portion of the main frame 11 in the front-rear direction are respectively left and right. Branch The entire twin rake A is constructed by assembling the frame 2 in a side-branch shape, attaching the central machine frame 30 of the rotor to each protruding end of the support frame 2 of the rotor, and mounting the rotor 3 on the central machine frame 30 doing.

  As shown in FIGS. 3 and 4, the rotor 3 that pivots on the outer ends of the support frames 2 of the left and right rotors has a vertical rotation shaft on the lower surface of the central machine frame 30 formed in a disk-shaped housing. Is provided with a plurality of arms 32 projecting in the radial direction at the peripheral edge of the rotating plate 31, and a fork-like shape for scraping grass and rice straw at each end of the arm 32. The arm 32 is regulated by a cam provided at the lower part of the rotor and an eccentric bearing provided at the base of the arm 32 so that the posture changes from a position depending on the arm 32 to a horizontal position. Installed and configured.

  The twin rake A connects the assembly machine frame 10 to the connection hitch t of the tractor T as shown in FIG. 1, and the front end of the input shaft 14 to be mounted on the lower surface side of the main frame 11 is shown in FIG. 6 is connected to the output shaft (PTO shaft) 15 of the tractor T via the universal joint shaft 16 and the power distribution mechanism a in which the rotational power from the PTO shaft 15 is incorporated in the intermediate portion of the main frame 11. Then, the transmission gear mechanism b that also serves as a speed reduction mechanism for storing the tip of the drive shaft 3a in the central machine frame 30 of the rotor is transmitted to the drive shaft 3a of the rotor that can be stored in the support frame 2 of the left and right rotors. The rotor 3 is decelerated and rotated through the rotor shaft, and the rotor 3 is rotated at a reduced speed. Grass, etc. are used as continue to grass in a row.

  During the grass collection operation, the rotating left and right rotors 3 and 3 are arranged so that the grass scraped by the fork-shaped toothed hooks 33 provided on the rotating rotors 3 is arranged symmetrically on the left and right. Of the rotors 3 and 3 so as to gather in a single row in the middle of the left and right rotors 3 and 3. As indicated by the double line arrows in FIG. 5, the rotation directions are opposite to each other so that the front edge side of each rotor 3 is rotated toward the rear edge side through the inside which is the opposite side. It is set as follows.

  Therefore, in the power transmission mechanism that transmits the rotational power from the input shaft 14 to the left and right rotors 3, the power distribution mechanism a provided in the middle portion of the main frame 11 is provided on the input shaft 14 as shown in FIG. Two transmission gears, a transmission gear g1 for driving one drive shaft 3a and a transmission gear g2 for driving the other drive shaft 3a, so that each drive shaft 3a of the rotor 3 can be driven separately. Assembling, each drive shaft 3a is provided with conductive gears g3 and g4 respectively engaged with the two conductive gears g1 and g2 on each inner end side thereof, and the four conductive gears are combined. The center of each rotor 3 is set such that the left and right drive shafts 3a and 3a are rotated in opposite directions, and the rotational power from the left and right drive shafts 3a is transmitted to the left and right rotors 3. As described in the upper part and the lower part of FIG. 7, the transmission gear mechanism b also serving as a speed reduction mechanism stored in the frame 30 includes a transmission gear g5 composed of a large-diameter bevel gear assembled to the rotating shaft of the rotor 3, and a drive shaft 3a. A combination of two gears, a small-diameter bevel-shaped transmission gear g6 that is assembled on the outer end side of the gear and meshes with the large-diameter transmission gear g5, and is assembled symmetrically on the left and right. Thus, the working side of each of the left and right rotors 3 is rotated inward.

  The power transmission means for transmitting the rotational power to the left and right rotors 3 and 3 of the twin rake A includes the means shown in FIGS. 8 to 13 in addition to the means shown in FIGS. .

  This means that the left and right rotors 3, 3 are supported by supporting the central machine frame 30 of the rotor 3 on each outer end of the support frame 2 of the rotor that protrudes to the left and right assembled at the front and rear intermediate parts of the main frame 11. The center machine frame 30 is pivotally supported with the rotation axis of the rotor 3 as the vertical direction, and the rotor 3 is assembled to the rotation axis so as to be mounted in the same manner as the twin rake shown in FIG. The power distribution mechanism a for distributing and transmitting rotational power from the input shaft 14 to the left and right rotors 3 is separated from the support frame 2 of the aforementioned rotor assembled to the main frame 11, and the main frame 11 The drive shaft 3a, which is installed at a position close to the front end side and transmits the rotational power from the power distribution mechanism a to the left and right rotors 3, 3, is located on the lower surface side of the support frame 2 of the left and right rotors. As a state of being pulled out and exposed, a shaft is mounted between the power distribution mechanism a and the central machine frame 30 of the rotor at the tip of the support frame 2 of the rotor so as to be obliquely crossed, and the inner end side of the drive shaft 3a. Is connected to the transmission gear of the power distribution mechanism a, the outer end side is connected to the transmission gear mechanism b incorporated in the central machine casing 30 of the rotor, and the oblique drive shaft 3a is driven by the rotation of the input shaft 14, The left and right rotors 3 are rotated opposite to each other.

  In this example, the power distribution mechanism a is assembled with a transmission gear g1 formed as a bevel gear on the rear end side of the input shaft 14 as shown in the enlarged view on the right side of FIG. A transmission gear g3 formed on a bevel gear assembled on the inner end side of one drive shaft (right drive shaft in the figure) 3a mounted on the machine frame a 'in an oblique posture in plan view with respect to the input shaft 14. Is engaged with a transmission gear g1 provided on the input shaft 14, and this one drive shaft 3a has a transmission gear formed on a bevel gear at a position facing the above-described transmission gear g3 in the machine frame a ′. G2 is assembled symmetrically with the transmission gear g3, and the transmission gear g2 assembled to one of the drive shafts 3a is assembled to the inner end of the other drive shaft 3a that is pivoted on the inner end side of the machine frame a ′. It is configured by meshing with a transmission gear g4 made of a bevel gear, and thereby, the rotational power from the input shaft 14 is distributed and transmitted to the left and right drive shafts 3a, and each of them rotates in the opposite direction. I try to let them.

  Further, the transmission gear mechanism b that conducts rotational power from the left and right drive shafts 3a to the left and right rotors 3 has a small diameter provided at the outer end of each drive shaft 3a, as shown in the enlarged view on the right side of FIG. The bevel gear g5 is configured by meshing with a transmission gear g6 made of a large-diameter bevel gear incorporated in the central machine casing 30 of each rotor 3, and this is connected to the central machine casing 30 of the left and right rotors 3 on the left and right. It arrange | positions so that it may be symmetrical, and it incorporates, and, thereby, the rotor 3 is decelerated and rotated.

  In the power transmission mechanism of the twin rake constructed as described above, the left and right rotors 3 are reversely connected to the left and right drive shafts 3a that are driven via the power distribution mechanism a so that the opposite sides rotate from the front to the rear. The structure of rotating in the direction increases the number of gears and the number of parts required for the power distribution mechanism a, and the speed reduction transmission gear that transmits the rotational power by decelerating from the drive shaft 3a to the left and right rotors 3 Since the mechanism b requires different types of gears, there are a number of types of transmission gears, which increases the cost of the power transmission mechanism.

  As shown in FIGS. 12 and 13, the rake includes a center of the rotor 3 at the rear end of the main frame 11 that extends straight from the assembly machine frame 10 connected to the connection hitch t of the tractor T. The machine frame 30 is assembled in a connected manner, and the rotor 3 is rotatably mounted on the machine frame 30. The rotor 3 is mounted on the lower surface side of the main frame 11 through the universal joint 16 from the PTO shaft 15 of the tractor T. The rotational power transmitted to the input shaft 14 is transmitted from the rear end of the input shaft 14 to the transmission gear mechanism b that also functions as a speed reduction mechanism incorporated in the central machine casing 30 of the rotor 3 to rotate the rotor 3 and There is a type in which one rotor is used to gather grass that has been cut down and left unattended on one of the left and right sides of the rotor 3.

  The power transmission mechanism in this type is configured by combining an inexpensive spur gear with a power transmission mechanism a that does not require a single rotor and a speed reduction transmission gear mechanism b for rotating the rotor 3 at a reduced speed. By using a thing, it becomes a thing of cheap cost.

  As shown in FIGS. 14 and 15, the reduction transmission gear mechanism b configured by using this spur gear is a rotor that meshes with the large-diameter spur gear G1 assembled to the rotation shaft y of the rotor 3. A pair of spur gears with a small-diameter spur gear G2 that is pivotally supported by the central machine casing 30 and a small-diameter bevel gear G3 that is assembled to the rotation shaft z of the small-diameter spur gear G2. A pair of small-diameter bevel gears G4 and a small-diameter bevel gear assembled at the rear end constitute a pair of spur gears that can be manufactured at a low cost. However, the speed reduction transmission gear mechanism b using this spur gear is not used in a twin rake power transmission mechanism.

  In order to reduce the cost of the power transmission mechanism of the twin rake, three gears in which the power distribution mechanism a is directly meshed with the transmission gear assembled to the input shaft and the transmission gear assembled to the inner ends of the left and right drive shafts, respectively. A means for reducing the number of gears can be considered. However, this means that the rotation directions of the gears assembled to the left and right drive shafts 3a meshing with the gear assembled to the input shaft 14 are the same, so that the left and right drive shafts 3a are in the same direction. Since it comes to rotate, there is a problem that the left and right rotors 3 that are rotated via the speed reduction transmission gear mechanism b cannot be rotated oppositely.

  In addition, as shown in FIGS. 20 and 21, the twin rake A is attached with a harvester B such as a roll baler connected to the rear of the main frame 1 of the twin rake A so that the grass collected by the twin rake A is collected. There is a form called a combination rake that allows harvesting and harvesting to be performed at the same time by allowing harvesting with the connected harvester B.

  The twin rake A in the form of a combination rake performs rotational operation of the left and right rotors 3 and operation of a harvesting machine such as a connected roll baler B with rotational power output from the PTO shaft 15 of the tractor T to be pulled. 22 and FIG. 23, the main body frame 1 of the twin rake A has a power transmission mechanism for transmitting the rotational power guided to the input shaft 14 to the left and right rotors 3, and the rear of the main body frame 1. And a power transmission mechanism for transmitting to the input shaft of the connected roll baler B.

  22 and FIG. 23, the front end side of the main frame 11 of the main body frame 1 of the twin rake A is closer to the front end of the main body frame 1 than the input shaft 14 in FIGS. A rotor drive shaft s1 connected via a transmission mechanism D provided in the part, a power distribution mechanism a provided at an intermediate portion before and after the main frame 11 and connected to the rear end side of the rotor drive shaft s1, and its power The left and right rotor 3 drive shafts 3a project so as to branch from the distribution mechanism a to the left and right, and the left and right rotor shafts 3a are driven to decelerate and transmit rotational power from the respective outer ends of the left and right drive shafts 3a A power transmission mechanism comprising a reduction transmission gear mechanism b incorporated in the central machine casing 30 of the rotor 3 is mounted in the same manner as a normal twin rake.

  In addition to the power transmission mechanism for driving the left and right rotors 3, in order to conduct rotational power to the input shaft B ′ of the roll baler B to be connected to the rear, the front end side is connected to the transmission mechanism D, A baler drive shaft s2 whose rear end is pivotally supported by the rear end portion of the main body frame 1, and a shaft joint j provided at a portion of the baler drive shaft s2 protruding rearward from the rear portion of the main body frame 1. A power transmission mechanism is further mounted.

  The twin rake in a form called a combination rake is equipped with two drive shafts, a rotor drive shaft s1 and a bale drive shaft s2, in addition to the high-cost power transmission mechanism that is provided in a normal twin rake. Thus, there is a problem that the power transmission mechanism is remarkably expensive.

  The problem to be solved in the present invention is that the number of transmission gears required for the power distribution mechanism a is reduced and the spur gear is combined with the reduction transmission gear mechanism b under the condition that the left and right rotors of the twin rake are opposed to each other. Using a gear mechanism, the power transmission mechanism of twin rakes can be constructed at low cost, and the power transmission mechanism for driving a linked roll baler added when using a twin rake as a combination rake with a roll baler connected to the rear is inexpensive. It is in the point to constitute.

As a means for solving the above-described problems, in the present invention, a power distribution mechanism a that distributes power from the twin rake input shaft to the drive shafts of the left and right rotors and a bevel gear provided on the rear end side of the input shaft and the left and right A reduction transmission gear mechanism b provided between the outer end side of the left and right drive shafts and the rotation shafts of the left and right rotors. A pair of spur gears, a large-diameter spur gear to be assembled with the rotation shaft of the rotor and a small-diameter spur gear meshing therewith, a small-diameter bevel gear to be assembled to the rotation shaft of the small-diameter spur gear, and a drive shaft The reduction transmission gear mechanism b includes a pair of bevel gears with a small-diameter bevel gear provided on the outer end side, and the reduction transmission gear mechanism b is incorporated in one of the left and right rotors. In the structure b, the small-diameter bevel gear provided on the rotation shaft of the small-diameter spur gear is assembled in an upward posture, and the small-diameter bevel gear provided on the drive shaft side is brought into contact with the upper shaft side to mesh with each other. In the reduction transmission gear mechanism b incorporated in the other rotor, a small-diameter bevel gear provided on the rotating shaft of a small-diameter spur gear is assembled in a downward posture, and a small-diameter bevel gear provided on the drive shaft side is attached to this from the lower surface side. Proposing the first invention means characterized by contacting and meshing,
At the same time, the main body frame 1 of the twin rake A is inputted from the output shaft 15 of the tractor T so as to conduct the rotational power to the left and right rotors 3 and 3 through the power distribution mechanism a and the reduction transmission gear mechanism b. An input shaft 14 mounted on the main body frame 1 is extended rearwardly toward the rear of the main body frame 1 , and a shaft joint j connected to a roll baler B connected and attached to the rear of the twin rake A is provided at the extended end thereof. in powertrain in Tsu Inreki a configured such that the drive shaft of the input shaft 4 of the rear extension portion role-based la B of a, the Tsuinreki the body machine frame 1 of a, assembling machine provided at the front end A main frame 11 extended long rearward from the frame 10, and left and right assembled to the rear end of the main frame 11 so as to protrude right and left perpendicular to the main frame 11 in plan view Assemble with the support machine frame 13 of the traveling wheels 12 and 12 in a long T shape in front and rear in a plan view, and support the left and right rotors 3 and 3 in the middle part of the main machine frame 1 before and after the main frame 11 The frames 2 and 2 are assembled in a side branch shape so as to protrude right and left, and the rotor 3 is pivotally supported on the central machine frame 30 that can be supported on the outer ends of the left and right support frames 2 and 2, respectively. The left and right rotors 3 and 3 constitute a twin rake A located on both the left and right sides of the main frame 11, and the rear end portion of the rear extension portion of the input shaft 14 mounted on the main body frame 1 is the main body frame 1. Projecting rearward of the support machine frame 13 that supports the left and right traveling wheels 12 and 12, and extending to the input shaft B ′ of the roll baler B at the extended end of the input shaft 14 projecting rearward from the support machine frame 13. Universal joint shaft 16 It was allowed equipped with shaft coupling j of connecting conductive via is intended to raise the second invention means characterized by.

  In the first invention means of the present invention, the power distribution mechanism is a combination of three bevel gears in which the rotational directions of the left and right drive shafts are the same, but the number of gears is reduced, and A combination of a low-speed spur gear combined with a speed reduction transmission gear mechanism that rotates the left and right rotors at a reduced speed, and a pair of small-diameter bevel gears assembled in it are changed in the left and right directions so that they rotate in opposite directions. Therefore, the power transmission mechanism can be configured at low cost under the condition that the left and right rotors are rotated opposite to each other.

  Further, in the second invention means, the main shaft of the twin rake can be input without being equipped with a drive shaft for driving a harvesting machine such as a roll baler connected and attached to the rear of the twin rake as the second shaft. Since the harvesting machine can be driven by extending the shaft, the power transmission mechanism can be constructed at low cost when combined.

It is a top view of a normal twin rake. It is a side view of a twin rake same as the above. It is an enlarged plan view of the center part of the rotor of a twin rake same as the above. It is an enlarged side view of a center part same as the above twin rake. It is a top view showing the power transmission mechanism of the twin rake. It is a side view showing the power transmission mechanism of the twin rake. It is the top view showing the outline | summary of the power distribution mechanism part with respect to the right-and-left rotor drive shaft of the power transmission mechanism same as the above, and the reduction transmission gear mechanism part which decelerates and rotates a rotor from the outer end of a rotor drive shaft. FIG. 10 is a plan view of a twin rake in a form in which the power distribution mechanism is provided at a position separated from the support frames of the left and right rotors in the conventional twin rake, and an enlarged view of the power distribution mechanism is added. It is a side view of the twin rake of the form same as the above. It is a top view of the twin rake of the same form, and is explanatory drawing which added the enlarged view of the speed reduction transmission gear mechanism part provided between the outer end part of a right-and-left drive shaft and the center machine frame of a rotor. It is a side view of the twin rake of the same form. It is a top view of the rake of the single form which made one rotor pivoted on the main body machine frame of a rake. It is a side view of the rake of a form same as the above. It is a top view of the speed reduction transmission gear mechanism part integrated in the center machine frame of a rotor among the power transmission mechanisms with which the rake of the same form is equipped. It is a side view of the deceleration transmission gear mechanism part same as the above. It is a top view of the twin rake which implements the power transmission mechanism by this invention. It is a side view of a twin rake same as the above. It is a top view and a side view of a reduction transmission gear mechanism incorporated in the central machine casing of the rotor on the right side (upper side in the figure) of the twin rake. It is a top view and a side view of a reduction transmission gear mechanism incorporated in the central machine casing of the rotor on the left side (lower side in the figure) of the twin rake. FIG. 5 is a plan view of a combination rake configured by connecting and mounting a roll baler behind the main frame of the twin rake. It is a side view of a combination rake same as the above. It is a top view in the state where the power transmission mechanism of the combination rake shown above was shown. It is a side view of a combination rake same as the above. It is a top view of the combination rake which implements the power transmission mechanism by this invention. It is a side view of a combination rake same as the above.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  16 is a plan view of a twin rake that implements the power transmission mechanism according to the present invention, FIG. 17 is a side view of the twin rake of the same, and in FIGS. 16 and 17, 1 is a main body frame of the twin rake A, and the front end side. A vertical seat plate-like assembly machine frame 10 provided on the main frame 11, a main frame 11 having a front end assembled to the upper part of the rear surface side of the assembly machine frame 10 and extending rearwardly, and the main frame 11 and the support machine frame 13 of the traveling wheel 12 assembled so as to protrude to the left and right perpendicular to the rear end of the vehicle 11 and assembled in a T-shape that is substantially long in the front-rear direction.

  Reference numerals 2 and 2 denote support frames of the rotor assembled so as to protrude in the shape of side plates to the left and right at the front and rear intermediate portions of the main frame 11 of the main body frame 1. A central machine frame 30 is supported at each outer end of the main frame 11, and the rotor 3 is pivotally supported by the central machine frame 30 so that the rotor 3 is pivoted so as to be positioned on both the left and right sides of the main frame 11. There is a twin rake A.

  W is connected to the tractor T by connecting the twin rake A to the assembly machine frame 10 provided on the front end side of the main body machine frame 1 and the connection hitch t provided on the rear part of the vehicle body of the tractor T. This is a power transmission mechanism for driving the left and right rotors 3 and 3 by the rotational power guided from the PTO shaft 15 of the tractor T to be pulled when the tractor T is pulled by the traveling of the tractor T to collect grass. An input shaft 14 for inputting rotational power from the PTO shaft 15 via the universal joint shaft 16, and a power distribution mechanism for distributing and transmitting the rotational power from the input shaft 14 to the drive shafts 3a of the left and right rotors 3 and 3. a and a reduction transmission gear mechanism b that decelerates and transmits to the left and right rotors 3 from the outer end of each drive shaft 3a.

  The input shaft 14 is formed in the shape of a shaft that is long in the front-rear direction, and is arranged along the main frame 11 below the main frame 11 of the main body frame 1, and the front end side is It is pivotally supported on a pivotal support member provided near the front end of the main frame 11, and the intermediate portion is pivotally supported on the machine frame a 'of the power distribution mechanism a assembled to the intermediate portion of the main frame 11, thereby The rear end of the machine frame 1 is extended rearward from the machine frame a ′ of the power distribution mechanism a. The shaft mounting means for the main body frame 1 of the input shaft 14 is not limited to the above example, and may be arbitrarily performed.

  A shaft joint j is provided at the front end portion of the input shaft 14, and rotational power is input from the tractor T side by connecting and connecting the shaft joint j and the PTO shaft 15 of the tractor T via the universal joint shaft 16. I am doing so. The connecting means between the input shaft 14 and the PTO shaft 15 of the tractor T is also arbitrary, and may be connected by other appropriate means.

  The power distribution mechanism a is a mechanism that distributes and transmits rotational power from the input shaft 14 to the left and right drive shafts 3a and 3a that drive the left and right rotors 3. The drive shaft 3a that drives the rotor 3 is usually By being provided along the lower surface of the support frame 2 of the rotor that protrudes left and right from the main frame 11 of the main body frame 1, the main frame 11 is assembled to an intermediate portion before and after the connection of the support frame 2 of the rotor. In the example, it is assembled and mounted at a position near the front end of the main frame 11 that is separated from the connection position of the support frame 2 of the rotor.

  The left and right drive shafts 3a are obliquely bridged between the machine casing a ′ of the power distribution mechanism a and the central machine casing 30 of the left and right rotors 3 in plan view, and the machine casing a ′. And the central machine frame 30. The drive shaft 3a is exposed without being covered with a case or a cover.

  The distribution of rotational power from the input shaft 14 to the left and right drive shafts 3a of the power distribution mechanism a is a normal one performed by a combination of a drive-side gear assembled to the input shaft 14 and a passive-side gear assembled to the drive shaft 3a. It is.

  In the conventional twin rake A, the distribution mechanism constituted by this gear combination rotates the drive shaft 3a to be distributed and driven in the same direction in order to rotate the left and right rotors 3 to face each other, and the outer end of the drive shaft 3a. Since the reduction transmission gear mechanism b incorporated between the rotor and the central machine casing 30 of the rotor 3 is incorporated in a symmetrical form in the left and right directions so that the left and right rotors 3 are opposed to each other. As described above, two bevel gears g1 and g2 are assembled in parallel on the input shaft 14 and bevel gears g3 and g4 assembled on the inner end side of each drive shaft 3a so as to mesh with these gears g1 and g2. It is configured to use a single bevel gear.

  However, in this embodiment of the present invention, as shown in the upper part of FIG. 16, the power distribution mechanism a includes a bevel gear g1 assembled to a portion of the input shaft 14 that is mounted on the machine frame a ′ of the distribution mechanism a. And bevel gears g2 and g3 which are assembled to the bevel gear g1 assembled to the input shaft 14 and assembled to the outer end of each drive shaft 3a pivoted on the machine frame a '. Thus, although the left and right drive shafts 3a rotate in the same direction, the number of gears used is one less than that of the conventional distribution mechanism shown in FIG. Is cheap.

  The reduction transmission gear mechanism b is for decelerating and transmitting rotational power from the outer ends of the left and right drive shafts 3a to the left and right rotors 3, respectively. In this embodiment, in order to reduce the manufacturing cost, The rotor 3 described above is configured by combining inexpensive spur gears mounted on one single rake (FIG. 12).

  FIG. 18 shows each state of the reduction transmission gear mechanism b configured by combining the spur gears in a top view and a side view. In FIG. 18, 30 is a rotor assembled so as to protrude left and right with respect to the main frame 11. A central machine frame 3 supported on the outer end of the support frame 2 is a rotor that can be pivoted on the lower surface side of the central machine frame 30 by a vertical rotation axis y.

  G1 is a large-diameter spur gear assembled to the rotary shaft y of the rotor 3 in the central machine casing 30, and G2 is a large-diameter spur gear that constitutes a speed reduction mechanism in combination with the large-diameter spur gear G1. A small-diameter spur gear G3 meshed with the gear G1 and pivotally supported on the central machine frame 30 is integrated with the rotary shaft z of the small-diameter spur gear G2 so as to operate a reduction mechanism composed of the pair of spur gears. The small-diameter bevel gear G4 is a bevel gear that is assembled to the outer end of the drive shaft 3a and meshed with the small-diameter bevel gear G3 so that the small-diameter bevel gear G3 is rotated by the rotation of the drive shaft 3a. is there. The reduction transmission gear mechanism b is thus constituted by a pair of spur gears G1 and G2 and a pair of small-diameter bevel gears G3 and G4 that operate the gears.

  Thus, regarding the reduction transmission gear mechanism b using the spur gear configured as described above, a configuration is further added in the means of the present invention.

  When assembled into the central machine casing 30 of the left and right rotors 3, for example, when incorporated into the right rotor 3 positioned above in FIG. 16, it is incorporated with the configuration shown in FIG. In the reduction transmission gear mechanism b incorporated in the left rotor 3 positioned, as shown in FIG. 19, a small-diameter bevel gear G3 assembled to the shaft z of the small-diameter spur gear G2 and a drive shaft 3a meshing with the small-diameter bevel gear G3. A combination of a pair of bevel gears with a small-diameter bevel gear G4 to be assembled is made by projecting the shaft z of the small-diameter spur gear G1 long upwards, and placing the small-diameter bevel gear G3 on the upper end side of the shaft z, with the tooth surface facing downward. And a small-diameter bevel gear G4 provided on the outer end of the drive shaft 3a is brought into contact with the lower shaft and meshed therewith. The rotational direction of the rotational power transmitted from 3a through the pair of small-diameter bevel gears G3 and G4 to the small-diameter spur gear G2 is reduced by the pair of small-diameter bevel gears G3 and G4 in the reduction transmission gear mechanism b incorporated in the upper rotor 3. It is comprised so that it may become the direction opposite to the rotation direction of rotational power transmitted to the spur gear G2.

  As a result, the power transmission device in the twin rake A of this embodiment can reduce the cost because the power distribution mechanism a uses a small number of gears, but the left and right drive shafts 3a that are the left and right output shafts. The left and right rotors that are driven through a speed reduction transmission gear mechanism b configured by combining a spur gear from the power distribution mechanism a while using a combination of three gears in which the two axes of 3a are in the same direction 3 is a counter-rotating state in which the working side rotates inward.

  Accordingly, the cost of the twin rake power transmission device is low because the power distribution mechanism a has a low cost three-gear structure and the speed reduction transmission gear mechanism b has a combination of inexpensive spur gears. Shall.

24 and 25 show another embodiment.
In this embodiment, the power transmission means in the twin rake according to the present invention is implemented in a twin rake having a form called a combination rake.

  The combination rake is a form in which harvesters such as balers and harvesters are attached to the rear of the twin rake body, and the grass collected in rows in the twin rake is harvested by the subsequent harvester. This is a twin rake.

  24 and 25, T is a tractor, A is a twin rake in which the front end of the main body frame 1 is connected to a connection hitch t at the rear of the vehicle body of the tractor T, B is a rear portion of the main body frame 1 of the twin rake A, The harvester is connected and mounted, and in this example, the harvester is a roll baler.

  The twin rake A is a support frame 2 provided so that two rotors 3 are symmetrically arranged on the left and right sides of the main shaft 11 of the main body frame 1 so as to protrude left and right from the main shaft 11. Rotating power that is pivoted on each outer end and taken out from the PTO shaft 15 of the tractor T to be pulled is transmitted to the left and right rotors 3 through a power transmission mechanism that is provided on the lower surface side of the main body frame 1. This is a normal type twin rake in which the left and right rotors 3 are rotated opposite to each other.

  The roll baler B connected to the rear part of the main frame 1 of the twin rake A picks up the grass etc. by the operation of the pickup device p provided at the lower part on the front side of the machine body, sends it to the molding chamber inside the machine body, and forms it. It is a normal roll baler that is molded into a roll bale R with a bale molding device provided in the room and discharges the molded roll bale R to the rear of the machine body, and drives the operating parts of the pickup device p and the bale molding device, This is a towed roll baler that is driven by external rotational power input from an input shaft B ′ provided on the front side of the machine body.

  The power transmission means in the twin rake in the form of this combination rake is configured as described below. On the lower surface side of the main shaft 11 of the main body frame 1 of the twin rake A, an input shaft 14 connected to the tractor T via the PTO shaft 15 and the universal joint shaft 16 is formed long in the front-rear direction and rotated by a shaft support member. Mount it freely.

  In a portion near the front end of the input shaft 14, as shown in the enlarged view described below in FIG. 24, the transmission gear g1 assembled to the input shaft 14 and the drive shaft 3a of one rotor (upper in the figure). A power distribution device a having a configuration in which three gears are combined: a transmission gear g2 assembled at the inner end of the rotor and a transmission gear g3 assembled at the inner end of the drive shaft 3a of the other rotor (downward in the figure). Incorporate

  Rotational power transmitted to the left and right drive shafts 3a through the power distribution device a is placed in the central machine frame 30 of the left and right rotors 3 that can be pivotally mounted on the outer ends of the support frame 2 projecting left and right from the main shaft 11. A reduction transmission gear mechanism b for decelerating and transmitting to the rotating shaft y of the rotor 3 is incorporated. The reduction transmission gear mechanism b is an inexpensive flat transmission gear b similar to the reduction transmission gear mechanism b used in the first embodiment. A reduction transmission gear mechanism configured by a combination of gears and incorporated in the central machine casing 30 of the rotor 3 on one side (upper in FIG. 24) and the reduction transmission incorporated in the central machine casing 30 of the rotor 3 on the other side (lower in FIG. 24). In the first embodiment, the gear mechanism is a combination of a pair of bevel gears G3 and G4 for operating a small-diameter spur gear G2, as described with reference to FIGS. Ensure a contrary Igahyo and back, right and left rotor 3 incorporates configured to rotate in opposite directions.

  Thus, as described above, the input shaft 14 is extended rearward beyond the power distribution device a assembled in the middle, and the rear end portion of the extension portion is the rear portion of the main body frame 1 of the twin rake A. The rear end of the input shaft 14 is protruded rearward, and a shaft coupling j is provided at the rear end of the input shaft 14.

  The extension end of the input shaft 14 provided with the shaft joint j is connected to the input shaft B ′ of the harvesting machine B connected to the rear part of the main frame 1 of the twin rake A via the universal joint shaft 16. Thus, the extended portion of the input shaft 14 serves as a drive shaft that transmits rotational power to the input shaft of the harvester B, and drives the harvester B. The shaft coupling j provided at the extended end portion of the input shaft 14 may be arbitrarily configured as long as the conductive shaft can be assembled.

  The power transmission means in the combination rake of this embodiment is configured by extending the input shaft for transmitting rotational power to the left and right rotors of the twin rake, so that the drive shaft for driving the connected harvester is extended. In addition to the need for two drive shafts, a rotor drive shaft and a bale drive shaft, separately from the input shaft, the cost is remarkably reduced.

  Also, as shown in the example, a power distribution device a that distributes and transmits rotational power to the left and right rotors is configured with a combination of three gears, and the rotational power is reduced to each of the left and right rotors. When the speed reduction transmission gear mechanism b that is transmitted in combination with an inexpensive spur gear is used, the advantage of reducing the cost is also obtained.

A twin rake B roll baler B 'input shaft D transmission mechanism G1 large diameter spur gear G2 small diameter spur gear G3 G4 small diameter bevel gear R roll bale T tractor W power transmission mechanism a power distribution mechanism a' machine frame b transmission gear mechanism g1 g2 g3 g4 g5 g6 Transmission gear j Shaft coupling p Pickup device s1 Rotor drive shaft s2 Baler drive shaft t Connecting hitch y Rotor rotation shaft z Spur gear rotation shaft 1 Main machine frame 10 Assembly machine frame 11 Main frame 12 Traveling wheel 13 Support machine frame 14 Input shaft 15 Output shaft (PTO shaft)
16 Universal joint 2 Support frame 3 Rotor 3a Rotor drive shaft 30 Rotor central machine frame 31 Rotating plate 32 Arm 33 Tooth

Claims (2)

  A power distribution mechanism (a) for distributing power from the twin rake input shaft to the drive shafts of the left and right rotors, a bevel gear provided on the rear end side of the input shaft, and a bevel gear provided on each inner end of the left and right drive shafts; A reduction transmission gear mechanism (b) provided between the outer end sides of the left and right drive shafts and the rotation shafts of the left and right rotors is assembled to the rotation shaft of the rotor. A pair of spur gears, a gear and a small-diameter spur gear meshing with the gear, a small-diameter bevel gear assembled to the rotating shaft of the small-diameter spur gear, and a small-diameter bevel gear meshing with the small-diameter bevel gear provided on the outer end side of the drive shaft The reduction transmission gear mechanism (b) is a rotation transmission shaft of a small-diameter spur gear in the reduction transmission gear mechanism (b) incorporated into one of the left and right rotors. In the reduction transmission gear mechanism (b), the small-diameter bevel gear to be provided is assembled in an upward posture, and the small-diameter bevel gear provided on the drive shaft side is brought into contact with and engaged from the upper surface side. The twin rake is characterized in that a small-diameter bevel gear provided on the rotating shaft of a small-diameter spur gear is assembled in a downward posture, and a small-diameter bevel gear provided on the drive shaft side is brought into contact with and engaged from the lower surface side. Power transmission device. The twin rakes ( 10) are input from the output shaft (15 ) of the tractor (T) and transmit the rotational power to the left and right rotors (3) and (3) via the power distribution mechanism (a) and the reduction transmission gear mechanism (b). an input shaft which mounted on the body machine frame of a) (1) to (14), extending rearward toward the rear of the body machine frame (1), in its extended end portion, connected mounted at the rear of Tsuinreki (a) provided shaft coupling (j) connecting to roll baler (B) which, Tsu Inreki the rear extension of the input shaft (4) of Tsuinreki (a) is configured such that the drive shaft of the role-based la (B) In the power transmission device in (A), a main frame (11) in which the main body frame (1) of the twin rake (A) is extended long rearward from the assembly frame (10) provided on the front end side; In the plan view, the rear end of the main frame (11) And a support machine frame (13) for the left and right traveling wheels (12) and (12) assembled so as to protrude to the left and right perpendicular to the main frame (11). The support frame (2) and (2) of the left and right rotors (3) and (3) are inserted into the left and right in the shape of side branches at the middle part of the main frame (11) of the main body frame (1). The rotor (3) is pivotally supported on the central machine frame (30) which is assembled so as to protrude and can be supported on the outer ends of the left and right support frames (2) and (2). (3) and (3) constitute twin rakes A located on both the left and right sides of the main frame (11), and the rear end of the rear extension of the input shaft (14) mounted on the main body frame (1) The unit supports the left and right traveling wheels (12) and (12) of the main machine casing (1). Projecting rearward of the supporting machine frame (13) and extending to the input shaft (B ') of the roll baler (B) at the extended end of the input shaft (14) projecting rearward from the supporting machine frame (13). A power transmission device in a twin rake, which is equipped with a shaft joint (j) for conducting conduction through a universal joint shaft (16) .

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