JP4809722B2 - Combine drive mechanism - Google Patents

Description

  The present invention relates to a combination drive mechanism for driving a combine, in which a plurality of pull-up devices are arranged in parallel on the left and right at the front portion of a mowing unit, and a predetermined pull-up device is supported so as to swing up and swing.

  In a self-detaching combine, a plurality of stalks that have been raised in a predetermined posture by a pulling device are harvested, and the harvested cereals are merged and transported to an intermediate portion of the cutting width, and then fed to a supply and transport device. In this case, a cereal conveyance mode is adopted in which the cereals conveyed rearwardly are delivered and delivered in a sideways posture to the starting end of a feed chain provided in the threshing device.

In the above-described grain haul transport mode, the corn-crop merging conveyance path and the mowing apparatus are raised and located at the back of the apparatus, so that it is difficult to remove the clogging of the grain and to perform the inspection and maintenance work of the mowing apparatus. Therefore, for example, as shown in Patent Document 1, a part of the central side among a plurality of pulling devices installed in parallel at the front portion of the cutting unit is configured to be swingable and swingable. A configuration has been proposed in which clogging removal work and various inspection and maintenance work can be performed from a wide space opened by swinging up the apparatus.
JP 2004-81006 A

  The above structure that swings and opens the pulling device is a useful means for easily performing clogging removal and inspection work in the merging and conveying path of the harvested cereal and the cutting device. There was room for improvement in the drive structure.

  That is, the plurality of raising devices arranged in parallel are gear-linked to the counter shaft horizontally supported on the upper portion thereof. In the conventional structure, the swinging fulcrum of the raising device is the axis of the counter shaft. It was set at a position out of the range. Therefore, a pin engagement type clutch (35, 35a, 35b in FIGS. 4 and 10 of Patent Document 1) that can be engaged and disengaged in the direction of the rotational axis is interposed in the interlocking system of the pulling drive shaft that is interlocked with the bevel gear. When the pulling device is swung up and swinged, the clutch is automatically separated and the interlocking with the counter shaft is cut off, and the pulling device is lowered to the original position and the clutch is connected, so that the clutch shaft is connected again to the counter shaft. It was like that.

  For this reason, in order to properly align and engage and connect the transmission members constituting the separated clutch, a connection separation structure with high accuracy and rigidity is required, which is expensive and difficult to manufacture. there were. When the built-in pulling chain is turned when the pulling device is swung up, when the pulling device is swung down, the rotation phase of the transmission members in the clutch is shifted and the predetermined engagement connection becomes impossible. Therefore, it is necessary to raise the device while paying attention to the rotational phase of the transmission members in the clutch and to swing it down, and there is room for improvement in terms of handling.

  As a means for swinging and swinging the pulling device, in addition to the above-described conventional structure, a structure that supports the pulling device so as to swing and swing around the axis of the counter shaft is also conceivable. This structure can simplify the transmission structure compared to the conventional structure and has the advantage of excellent handling. However, the following problems are expected to occur when raising the lifting device. The In other words, since the countershaft is stopped during maintenance for swinging up and swinging the pulling device, the driven gear that is swung up together with the pulling device is connected to the driving shaft that is fixed to the stopped countershaft. The gear is rotated in the reverse direction relatively. For this reason, the raising chain is reversely rotated and the raising claw is caught and damaged, or the raising chain that causes the raising claw to rotate is cut.

  The present invention has been made by paying attention to such points, and while simplifying the transmission structure to the raising device, the raising device can be swung up smoothly and smoothly without receiving reverse drive from the counter shaft. The main purpose is to be able to move.

In the first aspect of the present invention, in the pulling drive structure of the combine in which a plurality of pulling devices are arranged in parallel on the left and right in the front portion of the cutting unit, and the predetermined pulling device is supported so as to swing up and swing.
The pulling device is geared to a counter shaft that is horizontally supported on the upper portion thereof, and supported so as to be swingable up and down around the axis of the counter shaft.
The power transmission system to the pulling device is provided with a transmission blocking means, and the transmission blocking means cuts off the transmission of the reverse driving force from the counter shaft to the lifting device caused by the swinging swing of the pulling device. Thea configured as is,
The direction in which the pulling device is swung up and swinged and the pulling drive direction of the counter shaft are set in the same direction .

  According to the above configuration, prior to raising and swinging the pulling device, the transmission blocking means is put into a blocking state. Even if the pulling device is swung up and swung in this state, the pulling device that is swung up and swung is not reversely driven.

Therefore, according to the first aspect of the present invention, the pull-up device is configured to be swingable up and down around the axis of the counter shaft, so that the conventional structure swings up and swings around a fulcrum different from the axis of the counter shaft. In comparison, the transmission structure can be simplified, and the problem of reverse drive due to the swing-up swing of the pulling device can be solved, and the maintenance of the cutting part can be performed more easily.
In addition, according to the above configuration, the rotation of the counter shaft when a part of the plurality of pulling devices is swung up and down, and the other pulling devices that are not swung up and swinging slightly operate in the normal pulling direction. As a result, it is possible to suitably perform the swinging and swinging of the raising device without any trouble in driving.

According to a second invention, in the first invention,
The transmission blocking means is provided in a power transmission system to the counter shaft.

  According to the above configuration, the counter shaft is brought into a freely rotating state by the transmission blocking means prior to swinging and swinging the pulling device. When the pulling device is swung up and swung in this state, a gear transmission system that interlocks and connects the counter shaft and the pulling device is driven and driven from the device side, and rotational force is applied to the counter shaft. In this case, since the counter shaft freely rotates, the pulling device that is swung up and swung is not reversely driven.

  It is possible to cope with swinging swings of some pulling devices or swinging swings of all pulling devices by providing only one transmission blocking means. Compared with the case where each of the pull-up devices is provided with the transmission blocking means to perform the same function, only one transmission blocking means is required, and the simplification of the transmission structure is not impaired.

According to a third invention, in the second invention,
The power transmission system for the countershaft is provided with a pulling transmission mechanism for performing a multi-stage shift, and the transmission blocking means is configured to block the transmission to the countershaft by holding the pulling transmission mechanism in a transmission neutral state. Is configured.

  According to the above configuration, transmission to the counter shaft is interrupted by utilizing the transmission neutral state that appears and appears in the speed change mechanism. Therefore, the transmission interrupting means that makes the counter shaft free to rotate is a dedicated mechanism such as a clutch. It can be easily configured without introducing.

According to a fourth invention, in the third invention,
The pulling and shifting mechanism is provided with detent means for holding an operating member to be shifted for shifting at a plurality of shift positions, and the detent means can hold the operating member at a neutral position. is there.

According to the above configuration, the third aspect of the invention can be suitably implemented by adding a simple modification that only adds one detent position to the detent means.

  FIG. 1 shows a side view of the front portion of the self-removing combine. The self-decomposing combine is configured such that a cutting unit 3 having a six-row cutting specification is connected to a front part of a traveling machine body 2 including a pair of left and right crawler traveling devices 1 so as to be movable up and down, and a driving unit 4 and a threshing are connected to the traveling machine body 2. The apparatus 5 and the grain collection tank 6 with an unloader are mounted.

  The mowing unit 3 is provided with a cylindrical mowing unit frame 10 that also serves as a transmission case in a forward-tilting posture. A rear end base of the mowing unit frame 10 is erected on the front end of the traveling machine body 2. The support base 11 is connected and supported so as to be able to swing up and down around a horizontal fulcrum P, and is driven to swing up and down by a hydraulic cylinder 12. The mowing unit frame 10 includes six raising devices 13 that cause the planted culm to a predetermined trimming posture, a hair clipper-type mowing device 14 that cuts the planted culm that has been caused, and the erected cereal for each item. Auxiliary conveyor belt 15 that is lightly scraped backward, a rotary packer 16 that scrapes and transports the stock of the harvested cereal rice cake backwards for each line, and the harvested cereal meal is conveyed to the intermediate part within the width of the two chopped breadths. 3 sets of merging / conveying devices 17, 18, and 19, and a feeding / conveying device 20 that conveys the merged cereal to the start end of the feed chain 7 provided on the lateral outer side of the threshing device 5. ing.

  As shown in FIG. 2, the merging and conveying device 17 on the left side of the machine body includes a stock transporting mechanism 17 a that sandwiches and transports the stock of the two left-handed cereal grains and a tip transporting mechanism 17 b that latches and transports the head. The converging and conveying device 18 in the central part is composed of a stock transporting mechanism 18a and a tip transporting mechanism 18b for two middle strips, and the converging and transporting device 19 on the right side of the machine body is transporting a stock for two right strips. It is comprised from the mechanism 19a and the tip conveyance mechanism 19b. The auxiliary transport belt 15 and the rotary packer 16 are respectively provided at the front ends of the stock transport mechanisms 17a, 18a, and 19a, and the adjacent rotary packers 16 are interlocked with each other in units of two stripes.

  The supply / conveyance device 20 is a cereal merging joint formed by the tip locking / conveying mechanism 21 formed by extending the right two-lined tip conveying mechanism 19b to the front of the feed chain 7 and the three sets of the merging / conveying devices 17, 18, and 19. It is composed of a stock holding and conveying mechanism 22 extended rearward from the location, and a horizontally-turned relay conveying mechanism 23 arranged in front of the feed chain 7, and is merged by the merging and conveying devices 17, 18, and 19. The cedar in the standing posture is received at the starting end of the supply and conveyance device 20, and is transferred to the starting end of the feed chain 7 while being changed to a sideways posture while being conveyed rearward and upward. .

  The stock holding and conveying mechanism 22 swings up and down around the front fulcrum and changes the conveyance end position, thereby changing the cereal delivery position to the feed chain 7 in the cocoon length direction to the threshing device 6. A function to change and adjust the cereal insertion length, a so-called handling depth adjustment function, is provided.

  The cutting part frame 10 is provided with a function as a cylindrical transmission case having a transmission shaft inserted therein, and power synchronized with the traveling speed transmitted to the fulcrum P is cut through the cutting part frame 10. Transmitted to the front part of the section 3, the pulling device 13, the mowing device 14, the auxiliary transport belt 15, the rotary packer 16, the merging transport devices 17, 18, 19, and the stock holding and transporting mechanism 22 of the supply transport device 20. Is driven at a speed synchronized with the traveling speed. The stock holding and transporting mechanism 22 of the supply and transport device 20 is driven by the power branched and taken out from the middle portion of the cutting unit frame 10, and the tip locking transport mechanism 21 and the relay transport mechanism 23 of the supply and transport device 20 are It is driven by the power branched at the fulcrum P.

  As shown in FIG. 4, the pulling device 13 has a pulling chain 35 extending over a driving sprocket 32 and a tension plate 33 arranged at the upper part of the raising case 31 and a guide roller 34 arranged at the lower part of the case. A plurality of raising claws 36 are pivotally attached to the raising chain 35 at a predetermined pitch, and the drive sprocket 32 is driven as follows. The

  As shown in FIG. 3, a support arm 37 made of a pipe bent in a mountain shape is extended forward from the base end portion of the cutting unit frame 10, and a horizontally long support frame 38 is formed at the front end of the support arm 37. Are connected. As shown in FIG. 5, the support frame 38 is formed in a cross-sectional shape having an upper portion 38a, a rear portion 38b, and a corner portion 38c by bending a plate material, and the support arm 37 is formed on the corner portion 38c. The front end is connected.

  As shown in FIGS. 4, 5, and 6, a support bracket 39 having a sheet metal structure is bolted to the support frame 38 at six locations in the lateral direction via an upper side portion 38 a and a rear side portion 38 b. An upper end portion of a vertically long cylindrical drive case 40 formed by aluminum die casting is fitted and supported so as to be swingable up and down around a lateral fulcrum X. The pull-up drive case 40 is configured in a bilaterally symmetric bilateral structure, and a counter shaft 41 made of a hexagonal shaft is passed through and supported at the upper end of the case 40 so as to be concentric with the lateral fulcrum X. In the case of this example, the four raising drive cases 40 on the center side are inserted into a common counter shaft 41 for each of the two erected units and are connected to each other by the connecting sleeves 42, and the raising and lowering drives at the left and right ends are also driven. The counter shaft 41 of the case 40 is butt-coupled to the counter shaft 41 via a connection sleeve 42, and the counter shaft 41 is configured to rotate as a single shaft.

  Each pulling drive case 40 has a transmission shaft 43 supported longitudinally along the longitudinal direction of the case. The transmission shaft 43 is linked to the counter shaft 41 via bevel gears G1 and G2, and is also driven to drive. A pulling drive shaft 44 supported in the front-rear direction at the lower portion of 40 and the transmission shaft 43 are interlocked and connected via bevel gears G3 and G4. The upper part of the case 31 is connected to the lower part of each of the drive case 40 and the drive shaft 44 is raised and protrudes forward from the case 31, and the drive sprocket 32 is connected to the protruding part. ing. In this case, as shown in FIG. 8, the counter shaft 41 is rotated in the front upward direction A so that the raising chain 35 of each raising device 13 is rotated in a predetermined raising direction. Each pulling drive shaft 44 is linked to the counter shaft 41 by a bevel gear.

  As shown in FIG. 4, a horizontally long cylindrical drive case 46 is orthogonally connected to the front end of the cutting unit frame 10, and pipe columns 47 and 48 are erected from near the left and right ends of the drive case 46. A vertical drive shaft 49 is inserted into the column 47 on the left side of the machine body. A lateral transmission shaft 50 that is rotationally driven by the power transmitted through the cutting unit frame 10 is inserted into the drive case 46, and a left end portion of the lateral transmission shaft 50 and the longitudinal transmission shaft 49 are arranged. Is linked to the bevel gear.

  A transmission case 51 is connected to an upper end portion of the support 47 on the left side of the machine body, and is connected to a pulling drive case 40 at the left end. As shown in FIG. 7, the transmission case 51 is equipped with an output shaft 52 in parallel with the longitudinal transmission shaft 49, and the output shaft 52 and the counter shaft 41 are linked and connected via bevel gears G5 and G6. The transmission mechanism 53 is provided between the longitudinal transmission shaft 49 and the output shaft 52.

  The pulling speed change mechanism 53 is formed by integrally forming a small-diameter driving gear G7 and a large-diameter driving gear G8, which are connected and fixed to the vertical transmission shaft 49, a large-diameter driven gear G9, and a small-diameter driven gear G10, and is attached to the output shaft 52 by a spline. The shift gear SG is configured to shift the shift gear SG upward and engage the large-diameter driven gear G9 with the small-diameter drive gear G7, thereby driving the output shaft 52 at a low speed and shifting the shift gear SG downward. The output shaft 52 is driven at high speed by engaging the small-diameter driven gear G10 with the large-diameter driving gear G8.

  A speed change operation shaft 55 having a shift fork 54 engaged with the shift gear SG is inserted into and supported by the speed change case 51, and the speed change operation shaft 55 is pushed and pulled.

  The shift gear SG can be held by the detent mechanism 60 at an upper constant speed position “L”, a lower high speed position “H”, and a neutral position “N” therebetween. The detent mechanism 60 is incorporated in the output shaft 52 and has a detent ball 62 projecting and urged radially outward by a spring 61 in any one of the annular grooves 63 formed at three locations in the axial direction on the inner periphery of the shift gear SG. By selectively engaging the shift gear SG, the shift gear SG is elastically held, and by pulling up and holding the speed change mechanism 53 in a neutral position, the output shaft 52 and the counter shaft 41 geared to the output shaft 52 are freely rotated. It can be held in a movable state.

  In order to facilitate clogging removal work on the back of the pulling device 13 in the grain haul transfer route and inspection and maintenance work of the transfer means, the pulling devices 13 at both ends of the six pulling devices 13 arranged in parallel are arranged. The four inner raising devices 13 excluding (L) and 13 (R) are swung up and swinged to open the front of the cutting part.

  The lower portions of the raising cases 31 in the four inner raising devices 13 are detachably connected to a front bracket 65 of a weed frame 64 extending forward from the drive case 36, and the front bracket 65 And the connection with the case 31 is released, and the weeding tool 66 inserted and connected to the front end of the weeding frame 64 is removed, so that the pulling device 13 is pulled up and the countershaft axis together with the drive case 40 The concentric lateral fulcrum X can be swung up about 90 ° upward. A gas spring 68 is installed over the elevating drive case 40 and a stay 67 fixedly arranged on the back of the elevating drive case 40, and the raised raising device 13 is held in its raised position by the extension biasing force of the gas spring 68. It is like that.

  As shown in FIG. 5, a decorative cover 69 that covers the counter shaft 41 from the front is attached to the front end of the support frame 38 so as to be able to swing up and down around the fulcrum y. When it moves, the decorative cover 69 is lifted upward and swayed. The support arm 37 that connects and supports the support frame 38 also serves as a support member for the dust-proof cover 70 that covers the upper portion of the front of the supply / conveyance device 20.

  Prior to swinging and swinging the pulling device 13, the pulling and shifting mechanism 53 is switched to neutral using the detent mechanism 60 to keep the counter shaft 41 in a freely rotatable state. As a result, the counter shaft 41, which is freely rotatable, is raised in the normal pulling drive direction A along with the swinging swing of the driving case 40, and is rotated by the same angle as the swinging angle of the driving case 40.

  When the pulling device 13 is swung up and swinged, the counter shaft 41 is lifted and rotated in the driving direction A, so that the pulling device 13 that is not swung up slightly operates in the normal driving direction. In this case, if the rotation resistance of the counter shaft 41 in the pulling drive direction A is larger than the chain rotation load of the swinging and swinging pulling device 13, the swinging and swinging pulling device 13 is reversely driven. Thus, the pulling chain 35 tends to be rotated in the direction opposite to the normal pulling operation direction, but the pulling claw 36 is pushed back to prevent the chain 35 from rotating backward. The counter shaft 41 is raised and rotated in the driving direction A.

[Other Examples]
(1) As shown in FIG. 9, the raising drive cases 40 of the four raising devices 13 on the central side are connected by two adjacent ones by stays 71, and the two devices are raised to swing the device 13 up and down. It is also possible to remove the stay 71 and return it to a form in which the apparatus 13 can be swung up and moved one by one. The pulling drive case 40 or the pulling device 13 itself of the four pulling devices 13 on the central side are connected by a stay (not shown) so that the four pulling devices 13 on the central side can be swung up and swung simultaneously. It can also be.

  (2) The pulling devices 13 at both the left and right ends as well as the four central units can be configured to swing up and swing independently.

  (3) The pulling drive case 40 of the six pulling devices 13 or the pulling device 13 itself can be connected by a stay (not shown) so that all the pulling devices 13 can be swung up and swung simultaneously.

  (4) As shown in FIG. 10, the operating unit 4 is configured to have a cabin specification, and a vertical rotation type auxiliary pulling device 72 is mounted on the front portion of the pulling device 13 for raising a fallen crop. When the pulling device 13 and the auxiliary pulling device 72 are configured to swing up and swing together, the check member 73 projecting from the base of the auxiliary pulling device 72 is brought into contact with the upper surface of the support frame 38. Thus, when the pulling device 13 located in front of the driving unit 4 is swung up and swinged, the auxiliary pulling device 72 attached to the pulling device 13 interferes with the driving unit 4. You can avoid that.

  (5) The detent mechanism 60 that holds the shift gear (operation member) SG in a neutral position can be configured to act on the speed change operation shaft 55.

  (6) A known transmission structure can be appropriately selected for the pulling transmission mechanism 53. For example, one of the normally-engaged gear pairs that perform gear shifting in a plurality of stages can be switched to the transmission state. In this case, an operation member such as a shift sleeve and a shift key for selecting a transmission gear pair may be held at the neutral position to hold the counter shaft 41 in a freely rotating state.

  (7) By incorporating a dedicated clutch capable of switching the output shaft 52 between the transmission state and the idle state in the transmission case 51, the counter shaft 41 can be configured to be held in a freely rotating state.

  (8) The longitudinal transmission shaft 43 of the pull-up drive case 40 capable of swinging up and swinging is equipped with a clutch as a transmission blocking means, and when the pulling-up device 13 is swung up and swinged, the fixed counter shaft 41 It is also possible to block transmission of the reverse driving force of the lifting drive device 13 that is swung up and down.

Combine side view Top view of the cutting part Side view of the mowing unit with the pulling device open Rear view showing the entire structure of the pulling device drive Vertical side view of pulling device drive structure Front view showing the interlocking structure of the drive case and counter shaft Longitudinal front view of the pulling transmission Perspective view showing the outline of the pulling drive system Rear view showing another embodiment of the pulling device drive structure Side view showing another embodiment with an auxiliary pull-up device

Explanation of symbols

3 Cutting part 13 Pulling device 41 Counter shaft 53 Pulling speed change mechanism A Pulling drive direction
SG Actuating member (shift gear)
X fulcrum

Claims (4)

In the pull-up drive structure of the combine in which a plurality of pull-up devices are arranged in parallel on the left and right in the front part of the mowing unit, and the predetermined pull-up device is supported so as to swing up and swing,
The pulling device is geared to a counter shaft that is horizontally supported on the upper portion thereof, and supported so as to be swingable up and down around the axis of the counter shaft.
The power transmission system to the pulling device is provided with a transmission blocking means, and the transmission blocking means cuts off the transmission of the reverse driving force from the counter shaft to the lifting device caused by the swinging swing of the pulling device. Thea configured as is,
A pulling drive structure for a combine, wherein the pulling and swinging direction of the pulling device and the pulling drive direction of the counter shaft are set in the same direction .   The combine drive mechanism according to claim 1, wherein the transmission blocking means is provided in a power transmission system to the counter shaft.   The power transmission system for the countershaft is provided with a pulling transmission mechanism for performing a multi-stage shift, and the transmission blocking means is configured to block the transmission to the countershaft by holding the pulling transmission mechanism in a transmission neutral state. The structure for driving to drive a combine according to claim 2.   2. The pulling and shifting mechanism includes detent means for holding an operating member to be shifted for shifting at a plurality of shift positions, and the detent means can hold the operating member at a neutral position. 3. A combination drive structure for a combine according to 3.

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