JP2018029536A - combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine that can prevent the grain culm raked by reels from being caught on a reel drive device while suppressing projection to the outside of the reels of the reel drive device.SOLUTION: A speed reducer 91b in a combine 1 is constituted as a hypocycloid speed reducer including: a case arranged to a reaping unit 20; a main shaft 121 connected to a motor output shaft 112 and pivoted in a turning manner in the inside of the case, and having an eccentric shaft part; an external gear having external teeth in an outer circumferential surface, and capable of being eccentric and turned by being fitted around the eccentric shaft part; an internal gear where pins 129 engaged with the external teeth of the external gear are included more than the teeth number of the external teeth in an inner circumferential surface; and a turning transmission member turned around an axis center L being the same as the main shaft 121 in conjunction with the turning of the external gear, and connected to the turning shaft of reels 21.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a combine provided with a reel driving mechanism in a cutting part.

  Conventionally, the technique of the combine which drives the reel of a cutting part with an electric motor is well-known (for example, patent document 1). In the combine described in Patent Document 1, a reel driving device including an electric motor and a speed reducer is disposed on the side of the reel.

  According to the combine described in Patent Document 1, a reduction gear configured by a planetary gear mechanism is described as an example. When the reduction gear is configured with a planetary gear mechanism, the length of the reduction gear in the axial direction increases. For this reason, in Patent Document 1, a reduction gear is disposed inside the reel so that the amount of protrusion of the reel driving device to the outside of the reel does not increase. However, when the speed reducer is disposed inside the reel as in Patent Document 1, there is a possibility that the cereals scraped by the reel may be caught by the speed reducer.

JP 2014-183794 A

  The present invention provides a combine that can suppress the amount of protrusion that the reel driving device protrudes laterally from the reel, and that prevents the cereal scraped by the reel from being caught by the reel driving device.

The combine according to claim 1 is:
A combine comprising a harvesting unit having a reel that scrapes the cereal and a drive device for the reel that generates power for driving the reel,
The reel driving device integrally includes a motor and a speed reducer interposed between the motor and the reel,
The speed reducer is
A case disposed in the cutting part;
A main shaft connected to the output shaft of the motor and pivotally supported inside the case and having an eccentric shaft portion;
An external gear having outer teeth on its outer peripheral surface and being eccentrically rotatable by being fitted around the eccentric shaft portion;
An internal gear formed with more internal teeth meshing with the external teeth of the external gear than the number of teeth of the external teeth;
A rotation transmission member that rotates about the same axis as the main shaft in conjunction with the rotation of the external gear and is connected to the rotation shaft of the reel;
It is a hypocycloid reduction gear provided with.

The combine according to claim 2,
The said rotation transmission member is arrange | positioned only at the one side in the thickness direction of the said external gear.

The combine according to claim 3.
The case is
A housing chamber for housing the main shaft, the external gear, and the internal gear is formed on the reel side in the axial direction of the main shaft,
A mounting portion for mounting the motor is formed on the motor side in the axial direction of the main shaft,
A support portion that supports the output shaft of the motor is formed in a midway portion in the axial direction of the main shaft.

The combine according to claim 4,
The output shaft of the motor is disposed in the case by shifting the shaft from the main shaft,
The main shaft is connected to the output shaft of the motor via a spur gear.

  According to the combine described in claim 1, it is possible to prevent the culm scraped with the reel from being caught by the reel driving device while suppressing the outward driving of the reel driving device.

  According to the combine described in claim 2, it is possible to further suppress the reel driving device from protruding outward from the reel.

  According to the combine described in claim 3, it is possible to further suppress the protrusion of the reel driving device to the outside of the reel.

  According to the combine described in claim 4, it is possible to suppress contact of the reel driving device with the cereal basket on the outer side of the reel.

The left view of the combine which concerns on this embodiment. Similarly, a top view of the combine. The top view of a reel. Side view of the reel. Sectional drawing of the drive device for reels which concerns on 1st embodiment. AA sectional view taken on the line in FIG. Sectional drawing of the drive device for reels concerning 2nd embodiment. Sectional drawing of the drive device for reels concerning 3rd embodiment.

  Below, the combine 1 which is a normal type combine is demonstrated. Below, the advancing direction of the combine 1 is prescribed | regulated as the front, and the right side toward the advancing direction is prescribed | regulated as a right side and demonstrated.

  As shown in FIGS. 1 and 2, the combine 1 includes an airframe 2, a traveling unit 10, a cutting unit 20, a threshing unit 30, a sorting unit 40, a grain storage unit 50, and a waste processing unit 60. A control unit 70, an engine 80, and a generator 81.

  The traveling unit 10 is provided in the lower part of the body 2. The traveling unit 10 includes a crawler type traveling device 11 having a pair of left and right crawlers, and is configured such that the body 2 can travel in the forward or backward direction by the crawler type traveling device 11.

The cutting unit 20 is provided in front of the machine body 2 and is supported so as to be movable up and down with respect to the machine body 2. The cutting unit 20 includes a reel 21, a cutting blade 22, a platform auger (PF auger) 23, and a feeder house conveyor (FH conveyor) 24. The reel 21, the cutting blade 22, and the PF auger 23 are supported by a cutting frame 25. A feeder house 26 is provided between the cutting frame 25 and the machine body 2, and an FH conveyor 24 is provided in the feeder house 26.
Further, the cutting unit 20 is provided with a reel driving device 91 including a reel electric motor 91 a for driving the reel 21. A detailed description of the arrangement structure of the reel 21 and the reel driving device 91 will be described later. In the cutting unit 20, the cutting blade 22, the PF auger 23, the FH conveyor 24, and the like may be driven by an electric motor in addition to the reel 21, and these driving electric motors are provided in the cutting unit 20. It may be provided.

  The reaping unit 20 scrapes the cereal with the reel 21, cuts the stock of the culm after squeezing with the cutting blade 22, and gathers the harvested cereal with the PF auger 23 before feeding it to the FH conveyor 24. It is configured so that it can be delivered to the threshing unit 30 by the FH conveyor 24.

The threshing unit 30 is provided on the upper left side of the machine body 2 and is disposed behind the reaping unit 20.
The threshing unit 30 has a handling cylinder and a concave. The threshing unit 30 is configured such that the threshing is carried out while the cereals conveyed from the cutting unit 20 are fed backward by the handling cylinder and the concave, and the threshing can be leaked.

The sorting unit 40 is provided in the lower left part of the machine body 2 and is disposed below the threshing unit 30.
The sorting unit 40 includes a swing sorting device, a wind sorting device, a grain transport device, a second reduction device, and the like. The sorting unit 40 swings and sorts the cereals falling from the threshing unit 30 by the swing sorting device into grains and swarf, and the further after the swing sorting by the wind sorting device, the grain and sawdust and the like. It is comprised so that it can carry out wind selection and can convey the grain after sorting to the grain storage part 50 side by a grain conveyance device.

  As shown in FIGS. 1 and 2, the grain storage unit 50 is provided in the front-rear central portion on the right side of the machine body 2 and is disposed on the right side of the threshing unit 30 and the sorting unit 40. The grain storage unit 50 includes a grain tank 51 and a grain discharging device 52. The grain storage part 50 stores the grain conveyed from the selection part 40 in the grain tank 51, conveys the stored grain in an arbitrary direction by the grain discharging device 52, and then discharges it to the outside. Configured to be able to.

  The waste disposal unit 60 is provided on the left rear upper side of the machine body 2 and is disposed behind the threshing unit 30 and the sorting unit 40. The waste processing unit 60 is configured to discharge the threshed culm from the threshing unit 30 to the outside as waste, and to discharge the swarf and dust from the sorting unit 40 to the outside. .

  The control unit 70 is provided so as to protrude forward from the right front end of the airframe 2, and is disposed in front of the grain storage unit 50. The control unit 70 is provided with operating tools such as a switch for operating the reel 21, the cutting blade 22, the PF auger 23, the FH conveyor 24 in the reaping unit 20, and the red pepper in the sorting unit 40. The control unit 70 is provided with various operating tools including a steering handle 76 and a shift lever, a control seat, and a cabin 77.

As shown in FIG. 2, the engine 80 is provided at the right front end of the airframe 2 and is disposed below the control unit 70. A generator 81 is provided on the left side of the engine 80. The generator 81 is connected to the engine 80 and is driven by the rotation of the engine 80 being transmitted.
A battery 82 is provided at the right rear end of the machine body 2. The battery 82 is electrically connected to the generator 81 and can store the electric power generated by the generator 81.

The combine 1 supplies the power of the engine 80 to the traveling unit 10, the threshing unit 30, the sorting unit 40 (excluding the red pepper 42a), the grain storage unit 50, and the waste processing unit 60 via a power transmission system including a transmission. These parts are driven by the power of the engine 80.
The combine 1 is driven at least with respect to the reel 21 of the cutting unit 20 by the power of the electric motor 91a for reels.

  During normal running, the reel electric motor 91 a is driven by electric power from the generator 81 driven by the engine 80. On the other hand, when the engine 80 is stopped, the reel electric motor 91 a is driven by the electric power from the battery 82.

  A control device (not shown) provided in the combine 1 is connected to an operation tool, an inverter, and the like for controlling the turning on and off of the reel 21 and the rotation speed. The control device receives the signal from the operation tool, thereby controlling the inverter to operate the rotation of the reel electric motor 91a. Thereby, the operation of the reel 21 is controlled.

  Hereinafter, an arrangement structure of the reel 21 and the reel driving device 91 including the reel electric motor 91a will be described.

  As shown in FIGS. 1 and 2, the reel 21 is disposed on the upper front side of the cutting frame 25. A rear portion of the pair of left and right support arms 21a is supported at the upper rear end of the cutting frame 25 so as to be movable up and down, and a lifting cylinder (not shown) is disposed between the cutting frame 25 and the support arm 21a. The support arm 21a protrudes upward and forward of the cutting frame 25, and the reel 21 is rotatably supported on the protruding end. The reel 21 is lifted and lowered by the lift cylinder so that the scraping height of the reel 21 can be adjusted.

  As shown in FIGS. 2, 3 and 4, the reel 21 includes a rotating shaft 21b horizontally supported by a pair of left and right support arms 21a, and a regular hexagonal reel frame 21c connected and fixed to the rotating shaft 21b. A tine mounting rod 21d horizontally supported rotatably at the six top portions of the left and right reel frames 21c, a plurality of tines 21e mounted in parallel at a fixed pitch on the tine mounting rod 21d, and a shaft of the rotating shaft 21b An auxiliary reel frame 21f having a regular hexagonal shape that is rotatably supported around an eccentric shaft center Q that is shifted rearward by a predetermined distance with respect to the center P.

  An arm 21g protrudes rearward from the right end of each tine mounting rod 21d, and the tip of the arm 21g is pivotally connected to the outer end corner of the auxiliary reel frame 21f. When the reel frame 21c is rotated around the axis P of the rotating shaft 21b, the auxiliary reel frame 21f rotates following the eccentric axis Q in synchronization with the reel frame 21c. While revolving around the axis P, it is rotated in the opposite direction around the axis of the tine mounting rod 21d so that the rotational attitude of the tine 21e is maintained constant. In this way, a mechanism for maintaining the rotation posture of the tine 21e constant is referred to as a crank mechanism. In the present embodiment, the crank mechanism (auxiliary reel frame 21 f, arm 21 g, etc.) is provided on the right side of the reel 21. A reel driving device 91 is connected to the reel 21.

The reel driving device 91 generates power for driving the reel 21.
As shown in FIG. 5, the reel driving device 91 is integrally provided with a reel electric motor 91 a and a speed reducer 91 b interposed between the reel electric motor 91 a and the reel 21.

  The reel drive device 91 is fixed to the side (left side) of the reel 21 at the front end of the left support arm 21a. As shown in FIG. 5, a cylindrical reduction gear case member 101 that constitutes a main body portion of the reduction gear 91 b is fixed to the support arm 21 a by fixing bolts 102. The left side surface of the speed reducer case member 101 is closed by a speed reducer cover member 103, and the speed reducer cover member 103 is fixed to the speed reducer case member 101 by a fixing bolt 104.

  A stator holding member 105 is disposed on the left side surface of the speed reducer lid member 103, and the stator holding member 105 and the motor lid member 106 constituting the main body portion of the reel electric motor 91 a are fixed to the speed reducer lid member 103 by fixing bolts 107. It is fixed. A stator 108 is fixed to the stator holding member 105.

  The reel electric motor 91a accommodates a motor output shaft 112 having a spline portion formed at the tip thereof extending into the reducer case member 101. Specifically, the bearing member 110 is disposed on the motor lid member 106, and the bearing member 111 is disposed on the reduction gear lid member 103. The motor output shaft 112 is rotatably supported by the motor lid member 106 and the speed reducer lid member 103 via the bearing members 110 and 111. A rotor 109 is fixed around the central portion of the motor output shaft 112 in the axial center direction. When power is supplied to the stator 108, the rotor 109 rotates to rotate the motor output shaft 112. The inside of the speed reducer 91b and the inside of the reel electric motor 91a are sealed by a seal member 113.

  A main shaft 121 having the same axis L as the motor output shaft 112 is accommodated in the reduction gear 91b. Specifically, the first rotation transmission member 132 is rotatably supported by the reduction gear case member 101 via the bearing member 130, and similarly, the second rotation transmission member 133 is rotated via the bearing member 131. Supported as possible. A bearing member 122 is disposed on the inner periphery of the first rotation transmission member 132, and a bearing member 123 is disposed on the inner periphery of the second rotation transmission member 133. Furthermore, the main shaft 121 can be rotated with respect to the first rotation transmission member 132 and the second rotation transmission member 133 by inserting the main shaft 121 through the bearing members 122 and 123.

  A spline hole 121a is formed in the central portion of the main shaft 121, and the main shaft 121 rotates integrally with the motor output shaft 112 by inserting the spline portion of the motor output shaft 112 into the spline hole 121a. A first eccentric shaft portion 121b is formed on the left outer peripheral portion of the main shaft 121 (see FIG. 6), and a second eccentric shaft portion 121c is formed on the right outer peripheral portion. The first eccentric shaft portion 121b and the second eccentric shaft portion 121c are arranged so that the eccentric directions are 180 degrees out of phase, thereby canceling the influence of the eccentricity.

  A first external gear 126 having external teeth on the outer peripheral surface is fitted around the first eccentric shaft portion 121b. A large number of rotating pins 124 are interposed between the outer peripheral surface of the first eccentric shaft portion 121 b and the inner peripheral surface of the first external gear 126. A second external gear 127 having external teeth on the outer peripheral surface is fitted around the second eccentric shaft portion 121c. A large number of rotation pins 125 are inserted between the outer peripheral surface of the second eccentric shaft portion 121 c and the inner peripheral surface of the second external gear 127.

  Around the first external gear 126 and the second external gear 127, there is one pin 129 on the inner peripheral surface of the speed reducer case member 101, which is one more than the number of teeth of the first external gear 126 and the second external gear 127. Many are provided. That is, an internal gear that meshes with the external teeth of the first external gear 126 and the second external gear 127 is formed on the inner peripheral surface of the speed reducer case member 101. With the external teeth of the first external gear 126 and the second external gear 127 meshed with the internal gear, the first eccentric shaft portion 121b and the second eccentric shaft portion 121c of the main shaft 121 rotate while being eccentric. Thus, the first external gear 126 and the second external gear 127 rotate along the inner peripheral surface of the internal gear. Specifically, when the main shaft 121 rotates clockwise in FIG. 6, the first external gear 126 and the second external gear 127 rotate counterclockwise.

  In the first external gear 126, four pin insertion holes 126a are formed penetrating in the thickness direction. Similarly, a pin insertion hole 127a is also formed in the second external gear 127 so as to penetrate in the thickness direction and to be at the same position as the pin insertion hole 126a. A transmission pin 134 is inserted through each pin insertion hole 126a and pin insertion hole 127a. Cylindrical sliding members 135 and 136 are interposed between the outer peripheral surface of the transmission pin 134 and the inner peripheral surfaces of the pin insertion hole 126a and the pin insertion hole 127a. The transmission pin 134 is inserted and fixed to the first rotation transmission member 132 and the second rotation transmission member 133. That is, the first rotation transmission member 132, the second rotation transmission member 133, and the transmission pin 134 are integrally configured.

  In the above configuration, when the first external gear 126 and the second external gear 127 are rotated along with the rotation of the main shaft 121, the first rotation transmission member 132 and the second rotation are interlocked with the rotation. The transmission member 133 rotates about the same axis as the axis L of the main shaft 121. A spline hole 133a is formed in the central portion of the second rotation transmitting member 133, and a spline portion formed at the tip of the rotating shaft 21b of the reel 21 is inserted into the spline hole 133a. In this way, the second rotation transmission member 133 is connected to the rotation shaft 21b of the reel 21, whereby the rotation shaft 21b rotates integrally with the second rotation transmission member 133.

  As shown in FIG. 5, in this embodiment, the axis of the motor output shaft 112 of the electric motor 91a for reels, the axis of the main shaft 121, and the axis of the rotating shaft 21b of the reel 21 are on the same axis L. It is arranged. As a result, the rotation of the reel electric motor 91a can be transmitted to the reel 21 without using a pulley, a belt member or the like, and the power transmission system to the reel 21 is configured in a compact manner.

The rotation of the motor output shaft 112 of the reel electric motor 91a is decelerated by the speed reducer 91b and then transmitted to the rotation shaft 21b of the reel 21 to drive the reel 21. By providing the speed reducer 91b, it is possible to obtain low speed and high torque with a small motor.
In this way, the reel driving device 91 generates power for driving the reel 21 by the reel electric motor 91a and the speed reducer 91b.

  As described above, in the combine 1 according to the present embodiment, the speed reducer 91b includes the case (the speed reducer case member 101 and the speed reducer lid member 103) disposed on the support arm 21a of the cutting unit 20, and the motor output shaft 112. And a main shaft 121 having an eccentric shaft portion (the first eccentric shaft portion 121b and the second eccentric shaft portion 121c) and having external teeth on the outer peripheral surface thereof. External gears (first external gear 126 and second external gear 127) that are eccentrically rotatable by being fitted around the eccentric shaft portion, and external gears on the inner peripheral surface thereof. The internal gear provided with more pins 129 that mesh with the teeth than the number of teeth of the external teeth, and the reel 21 that rotates about the same axis L as the main shaft 121 in conjunction with the rotation of the external gear. Rotation transmitting member ( As one rotation transmitting member 132 and the second rotation transmission member 133), it is configured as a hypocycloid speed reducer comprising a.

  According to the combine 1 which concerns on this embodiment, the speed reducer 91b is arrange | positioned on the outer side instead of the inner side of the reel 21, and the grain straw scraped by the reel 21 is prevented from being caught by the speed reducer 91b. In addition, since the reel driving device 91 in this embodiment is configured with the speed reducer 91b as a hypocycloid speed reducer, an equivalent speed reduction ratio is obtained as compared with the case where the reel driving apparatus 91 is configured with a planetary gear mechanism as in the prior art. The axial length can be shortened while ensuring. For this reason, the amount of protrusion of the reel driving device 91 to the outside of the reel 21 can be suppressed, and the reel driving device 91 can be prevented from coming into contact with the cereal.

  Next, the combine which concerns on 2nd embodiment is demonstrated using FIG. Since the combine which concerns on embodiment described after this embodiment is the same as that of the combine 1 which concerns on said 1st embodiment about structures other than the drive device 291 for reels, the structure of the drive device 291 for reels is demonstrated below. To do.

The reel driving device 291 generates power for driving the reel 21.
The reel driving device 291 is integrally provided with a reel electric motor 291 a and a speed reducer 291 b interposed between the reel electric motor 291 a and the reel 21.

  The reel driving device 291 is fixed to the side (left side) of the reel 21 at the front end of the left support arm 21a. As shown in FIG. 7, a cylindrical reduction gear case member 201 constituting the main body portion of the reduction gear 291 b is fixed to the support arm 21 a by a fixing bolt 202. In the case 201, an accommodation chamber 201a is formed on the reel 21 side (right side) in the axial direction (left-right direction) of a main shaft 221 described later. Further, a mounting portion 201b is formed on the side (left side) of the reel electric motor 291a in the speed reducer case member 201. A stator holding member 205 is disposed in the mounting portion 201b, and the stator holding member 205 and the motor lid member 206 constituting the main body portion of the reel electric motor 291a are fixed to the speed reducer case member 201 by fixing bolts 207. A stator 208 is fixed to the stator holding member 205. Thus, the reel electric motor 291a is mounted on the mounting portion 201b of the speed reducer case member 201.

  The reel electric motor 291 a accommodates a motor output shaft 212 in which a spline portion formed at the tip thereof extends into the reduction gear case member 201. Specifically, the bearing member 210 is disposed on the motor lid member 206, and the bearing member 211 is disposed on the support portion 201 c formed in the middle portion of the reduction gear case member 201 in the left-right direction. The motor output shaft 212 is rotatably supported by the motor lid member 206 and the speed reducer case member 201 via the bearing members 210 and 211. That is, the support portion 201 c in the speed reducer case member 201 supports the motor output shaft 212. A rotor 209 is fixed around the central portion of the motor output shaft 212 in the axial center direction. When power is supplied to the stator 208, the rotor 209 rotates and the motor output shaft 212 rotates.

  A main shaft 221 having the same axis as the motor output shaft 212 is housed in the housing chamber 201a of the speed reducer 291b. Specifically, the rotation transmission member 233 is rotatably supported by the speed reducer case member 201 via the bearing member 231. A bearing member 223 is disposed on the inner periphery of the rotation transmission member 233. Further, the motor output shaft 212 is inserted into the bearing member 223.

  A spline hole 221a is formed in the central portion of the main shaft 221, and the main shaft 221 rotates integrally with the motor output shaft 212 by inserting the spline portion of the motor output shaft 212 into the spline hole 221a. A first eccentric shaft portion 221b is formed on the left outer peripheral portion of the main shaft 221, and a second eccentric shaft portion 221c is formed on the right outer peripheral portion. The first eccentric shaft portion 221b and the second eccentric shaft portion 221c are arranged so that the eccentric directions are 180 degrees out of phase, thereby canceling the influence of the eccentricity.

  A first external gear 226 having external teeth on the outer peripheral surface is fitted around the first eccentric shaft portion 221b. A large number of rotating pins 224 are interposed between the outer peripheral surface of the first eccentric shaft portion 221b and the inner peripheral surface of the first external gear 226. A second external gear 227 having external teeth on the outer peripheral surface is fitted around the second eccentric shaft portion 221c. A large number of rotating pins 225 are interposed between the outer peripheral surface of the second eccentric shaft portion 221c and the inner peripheral surface of the second external gear 227.

  Around the first external gear 226 and the second external gear 227, there is one pin 229 on the inner peripheral surface of the speed reducer case member 201, which is one more than the number of teeth of the first external gear 226 and the second external gear 227. Many are provided. That is, an internal gear that meshes with the external teeth of the first external gear 226 and the second external gear 227 is formed on the inner peripheral surface of the speed reducer case member 201. With the external teeth of the first external gear 226 and the second external gear 227 meshing with the internal gear, the first eccentric shaft portion 221b and the second eccentric shaft portion 221c of the main shaft 221 rotate while being eccentric. Thus, the first external gear 226 and the second external gear 227 rotate along the inner peripheral surface of the internal gear. Thus, the main shaft 221, the first external gear 226, the second external gear 227, and the internal gear are accommodated in the accommodation chamber 201a of the reduction gear 291b.

  A pin insertion hole 226a is formed through the first external gear 226 in the thickness direction. Similarly, a pin insertion hole 227a is also formed in the second external gear 227 so as to penetrate in the thickness direction and be located at the same position as the pin insertion hole 226a. A transmission pin 234 is inserted through each pin insertion hole 226a and pin insertion hole 227a. Cylindrical sliding members 235 and 236 are interposed between the outer peripheral surface of the transmission pin 234 and the inner peripheral surfaces of the pin insertion hole 226a and the pin insertion hole 227a. The transmission pin 234 is inserted through the rotation transmission member 233 and fixed. That is, the rotation transmission member 233 and the transmission pin 234 are integrally configured.

  In the above configuration, when the first external gear 226 and the second external gear 227 rotate, the rotation transmission member 233 rotates around the same axis as the axis L of the main shaft 221 in conjunction with the rotation. Move. A spline hole 233a is formed in the central portion of the rotation transmitting member 233, and a spline portion formed at the tip of the rotating shaft 21b of the reel 21 is inserted into the spline hole 233a. In this way, the rotation transmission member 233 is connected to the rotation shaft 21b of the reel 21, whereby the rotation shaft 21b rotates integrally with the rotation transmission member 233.

The rotation of the motor output shaft 212 of the reel electric motor 291a is decelerated by the speed reducer 291b and then transmitted to the rotation shaft 21b of the reel 21 to drive the reel 21. By providing the speed reducer 291b, it is possible to obtain low speed and high torque with a small motor.
As described above, the reel driving device 291 generates power for driving the reel 21 by the reel electric motor 291a and the speed reducer 291b.

  As described above, in the combine according to the present embodiment, the speed reducer 291b is connected to the case (speed reducer case member 201) disposed in the cutting unit 20 and the motor output shaft 212, and can be rotated inside the case. And a main shaft 221 having an eccentric shaft portion (first eccentric shaft portion 221b and second eccentric shaft portion 221c), and having outer teeth on its outer peripheral surface and fitted around the eccentric shaft portion. The external gears (the first external gear 226 and the second external gear 227) that are eccentrically rotated by the external gear and the pin 229 that meshes with the external teeth of the external gear on the inner peripheral surface thereof. The internal gear provided with more than the number of teeth and the rotation connected to the rotation shaft 21b of the reel 21 while rotating around the same axis L as the main shaft 221 in conjunction with the rotation of the external gear. Hypocycloid comprising a transmission member 233 It is configured as a speed machine.

  According to the combine which concerns on this embodiment, the speed reducer 291b is arrange | positioned on the outer side instead of the inner side of the reel 21, and the grain straw scraped by the reel 21 is prevented from being caught by the speed reducer 291b. In addition, since the reel driving device 291 in this embodiment is configured with the speed reducer 291b as a hypocycloid speed reducer, the length in the axial direction is longer than that of a planetary gear mechanism as in the prior art. Can be shortened.

  Further, in the reel driving device 291 in the present embodiment, the rotation transmitting member 233 is disposed only on one side (right side) in the thickness direction of the external gear. Thereby, members, such as the reduction gear cover member 103, the bearing member 122, and the bearing member 130, can be omitted as compared with the reel driving device 91 in the first embodiment. Therefore, the reel drive device 291 can be reduced in weight and cost, and the amount of protrusion of the reel drive device 291 to the outside of the reel 21 can be further suppressed, so that the reel drive device 291 can be used as a cereal. Contact can be further suppressed.

  Further, in the reel driving device 291 in the present embodiment, the speed reducer case member 201 is disposed on the reel 21 side in the axial direction of the main shaft 221, the main shaft 221, the first external gear 226, the second external gear 227, A housing chamber 201a for housing the internal gear is formed. Further, the reduction gear case member 201 has a mounting portion 201b for mounting the reel electric motor 291a on the side of the reel electric motor 291a in the axial direction of the main shaft 221. Further, the reduction gear case member 201 is formed with a support portion 201 c that supports the motor output shaft 212 in the middle portion in the axial direction of the main shaft 221. Thus, in this embodiment, the accommodation chamber 201a, the mounting part 201b, and the support part 201c are formed in the speed reducer case member 201 which is one member. As a result, it is not necessary to use another case member, so that the amount of protrusion of the reel driving device 291 to the outside of the reel 21 can be further suppressed, and the reel driving device 291 can be further in contact with the cereal. Can be suppressed.

Next, the configuration of the reel driving device 391 in the combine according to the third embodiment will be described with reference to FIG.
The reel driving device 391 generates power for driving the reel 21.
The reel driving device 391 integrally includes a reel electric motor 391 a and a speed reducer 391 b interposed between the reel electric motor 391 a and the reel 21.

  The reel driving device 391 is fixed to the side (left side) of the reel 21 at the front end of the left support arm 21a. As shown in FIG. 8, a cylindrical reduction gear case member 301 that constitutes a main body portion of the reduction gear 391 b is fixed to the support arm 21 a by fixing bolts 302. A gear case member 303 is disposed on the left side surface of the speed reducer case member 301. A stator holding member 305 is disposed on the left side surface of the gear case member 303, and the stator holding member 305 and the motor lid member 306 constituting the main body portion of the electric motor 391a for reels are fixed to the gear case member 303 by fixing bolts 307. . A stator 308 is fixed to the stator holding member 305.

  The reel electric motor 391a accommodates a motor output shaft 312 in which a spline portion formed at the tip thereof extends into the speed reducer gear case member 303. Specifically, the bearing member 310 is disposed on the motor lid member 306, and the bearing member 311 is disposed on the gear case member 303. The motor output shaft 312 is rotatably disposed by the bearing members 310 and 311. A rotor 309 is fixed around the central portion of the motor output shaft 312 in the axial center direction. When power is supplied to the stator 308, the rotor 309 rotates and the motor output shaft 312 rotates.

  A motor gear 314 that is a spur gear is fixed to the spline portion of the motor output shaft 312. The motor gear 314 meshes with a reduction gear 315 that is also a spur gear. The reduction gear gear 315 is fixed to the connecting shaft 316, and a spline portion formed at the tip of the connecting shaft 316 is inserted into the reduction device case member 301 and can be rotated by the reduction device case member 301. It is supported.

  A main shaft 321 having the same axis as that of the connecting shaft 316 is accommodated in the reduction gear 391b. Specifically, the bearing member 322 is disposed on the inner peripheral portion of the speed reducer case member 301. Further, the rotation transmission member 333 is rotatably disposed and supported on the reduction gear case member 301 via the bearing member 331. A bearing member 323 is disposed on the inner periphery of the rotation transmission member 333. Further, the connecting shaft 316 is inserted through the bearing members 322 and 323.

  A spline hole 321a is formed in the central portion of the main shaft 321, and the main shaft 321 rotates integrally with the connection shaft 316 by inserting the spline portion of the connection shaft 316 into the spline hole 321a. Thus, in the present embodiment, the motor output shaft 312 in the electric motor 391a for reels is disposed on the speed reducer case member 301 with its axis shifted from the main shaft 321. The main shaft 321 is connected to the motor output shaft 312 via the motor gear 314 and the speed reducer gear 315.

  A first eccentric shaft portion 321b is formed on the left outer peripheral portion around the main shaft 321, and a second eccentric shaft portion 321c is formed on the right outer peripheral portion. The first eccentric shaft portion 321b and the second eccentric shaft portion 321c are arranged so that the eccentric directions are 180 degrees out of phase, thereby canceling the influence of the eccentricity.

  A first external gear 326 having external teeth on the outer peripheral surface is fitted around the first eccentric shaft portion 321b. A large number of rotating pins 324 are interposed between the outer peripheral surface of the first eccentric shaft portion 321 b and the inner peripheral surface of the first external gear 326. A second external gear 327 having external teeth on the outer peripheral surface is fitted around the second eccentric shaft portion 321c. A large number of rotating pins 325 are interposed between the outer peripheral surface of the second eccentric shaft portion 321 c and the inner peripheral surface of the second external gear 327.

  Around the first external gear 326 and the second external gear 327, there is one pin 329 on the inner peripheral surface of the speed reducer case member 301 than the number of teeth of the first external gear 326 and the second external gear 327. Many are provided. That is, an internal gear that meshes with the external teeth of the first external gear 326 and the second external gear 327 is formed on the inner peripheral surface of the speed reducer case member 301. While the external teeth of the first external gear 326 and the second external gear 327 are engaged with the internal gear, the first eccentric shaft portion 321b and the second eccentric shaft portion 321c of the main shaft 321 rotate while being eccentric. Thus, the first external gear 326 and the second external gear 327 rotate along the inner peripheral surface of the internal gear.

  A pin insertion hole 326a is formed in the first external gear 326 so as to penetrate in the thickness direction. Similarly, a pin insertion hole 327a is also formed in the second external gear 327 so as to penetrate in the thickness direction and to be at the same position as the pin insertion hole 326a. A transmission pin 334 is inserted through each pin insertion hole 326a and pin insertion hole 327a. Cylindrical sliding members 335 and 336 are interposed between the outer peripheral surface of the transmission pin 334 and the inner peripheral surfaces of the pin insertion hole 326a and the pin insertion hole 327a. The transmission pin 334 is inserted and fixed to the rotation transmission member 333. That is, the rotation transmission member 333 and the transmission pin 334 are integrally configured.

  In the above configuration, when the first external gear 326 and the second external gear 327 rotate, the rotation transmission member 333 rotates around the same axis as the axis L of the main shaft 321 in conjunction with the rotation. Move. A spline hole 333a is formed in the central portion of the rotation transmitting member 333, and a spline portion formed at the tip of the rotating shaft 21b of the reel 21 is inserted into the spline hole 333a. As described above, the rotation transmission member 333 is connected to the rotation shaft 21 b of the reel 21, so that the rotation shaft 21 b rotates integrally with the rotation transmission member 333.

The rotation of the motor output shaft 312 of the reel electric motor 391a is decelerated by the speed reducer 391b and then transmitted to the rotation shaft 21b of the reel 21 to drive the reel 21. By providing the speed reducer 391b, it is possible to obtain low speed and high torque with a small motor.
In this way, the reel driving device 391 generates power for driving the reel 21 by the reel electric motor 391a and the speed reducer 391b.

  As described above, in the combine according to the present embodiment, the speed reducer 391b is connected to the motor output shaft 312 via the case (speed reducer case member 301) disposed in the cutting unit 20, the motor gear 314, and the speed reducer gear 315. The main shaft 321 is connected and pivotally supported inside the case and has an eccentric shaft portion (first eccentric shaft portion 321b and second eccentric shaft portion 321c), and has outer teeth on its outer peripheral surface and is eccentric. External gears (first external gear 326 and second external gear 327) that are eccentrically rotatable by being fitted around the shaft portion, and external teeth of the external gear on the inner peripheral surface thereof And the internal gear provided with more pins 329 than the number of teeth of the external teeth, and rotating about the same axis L as the main shaft 321 in conjunction with the rotation of the external gear and the reel 21 Rotation connected to the rotation shaft 21b And reaches member 333 is configured as a hypocycloid speed reducer comprising a.

  According to the combine which concerns on this embodiment, the speed reducer 391b is arrange | positioned on the outer side instead of the inside of the reel 21, and the cereal rice cake scraped with the reel 21 is prevented from being caught by the speed reducer 391b. In addition, since the reel driving device 391 in this embodiment is configured with the speed reducer 391b as a hypocycloid speed reducer, the axial length is longer than that of a planetary gear mechanism as in the prior art. Can be shortened.

  Further, the reel driving device 291 in the present embodiment is arranged in the speed reducer case member 301 with the motor output shaft 312 and the main shaft 321 being offset from each other. The main shaft 321 is connected to the motor output shaft 312 via the motor gear 314 and the speed reducer gear 315. As a result, the reel electric motor 391 a can be offset with respect to the rotation shaft 21 b of the reel 21. In other words, by disposing the reel electric motor 391a upwardly, it is possible to suppress the reel electric motor 391a from coming into contact with the cereal.

DESCRIPTION OF SYMBOLS 1 Combine 20 Cutting part 21b Rotating shaft 91 Reel drive device 91a Reel electric motor 91b Reducer 112 Motor output shaft 121 Main shaft 129 Pin

Claims (4)

A combine comprising a harvesting unit having a reel that scrapes the cereal and a drive device for the reel that generates power for driving the reel,
The reel driving device integrally includes a motor and a speed reducer interposed between the motor and the reel,
The speed reducer is
A case disposed in the cutting part;
A main shaft connected to the output shaft of the motor and pivotally supported inside the case and having an eccentric shaft portion;
An external gear having outer teeth on its outer peripheral surface and being eccentrically rotatable by being fitted around the eccentric shaft portion;
An internal gear formed with more internal teeth meshing with the external teeth of the external gear than the number of teeth of the external teeth;
A rotation transmission member that rotates about the same axis as the main shaft in conjunction with the rotation of the external gear and is connected to the rotation shaft of the reel;
A combine, characterized in that it is a hypocycloid speed reducer.   The combine according to claim 1, wherein the rotation transmitting member is disposed only on one side in the thickness direction of the external gear. The case is
A housing chamber for housing the main shaft, the external gear, and the internal gear is formed on the reel side in the axial direction of the main shaft,
A mounting portion for mounting the motor is formed on the motor side in the axial direction of the main shaft,
The combine according to claim 1, wherein a support portion that supports the output shaft of the motor is formed in a midway portion in the axial direction of the main shaft. The output shaft of the motor is disposed in the case by shifting the shaft from the main shaft,
The combine according to claim 1 or 2, wherein the main shaft is connected to the output shaft of the motor via a spur gear.

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