JP2841483B2 - Scraping reel in combine - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to a scraping reel in a combine.

(Prior art)

Conventionally, a chain is wound between a passive gear and a drive gear fixed to the horizontal rotating shaft of a scraping reel of a reaping unit, and an interval between the passive gear and the drive gear is used for adjusting a reel front-rear direction according to a grain stem falling state. 2. Description of the Related Art A scraping reel of a harvester of a combine which is adjustable by a cylinder is known.

For example, Japanese Utility Model Laid-Open Publication No. Sho 63-122028 discloses that a drive gear disposed on the base side of a reel support arm, a fixed gear pivotally supported on an intermediate portion of the reel support arm, and a swing gear on an intermediate portion of the reel support arm. A chain is wound around a tension gear rotatably pivotally supported on a tension arm and a passive gear of a squeeze reel bearing on a support member movable back and forth with respect to the reel support arm. A tension spring is provided between the fixed position of the support arm and a tension spring for biasing the axial distance between the tension gear and the passive gear in a direction to increase the distance between the tension member and the passive gear. Is described.

Japanese Utility Model Laid-Open Publication No. 63-122028 describes a configuration in which a powder clutch mechanism is provided on the upper side of the transmission of the drive gear of the raking reel. When the raking reel moves rearward, it is rotated at a constant torque. When a load less than a certain torque is applied,
It is stated that the chain automatically rotates at the same speed as the high-speed side to remove the slack in the chain.

[Problems to be solved by the invention]

In the above-described conventional technology, when the front and rear positions of the raking reel are adjusted in response to the grain laying down state, the chain may be loosened and come off the gear.

Hereinafter, the cause of the chain detachment will be theoretically described (see FIGS. 4 to 6).

24 is a passive gear fixed to the horizontal rotation shaft of the scraping reel, 26 is a driving gear, 39 is a fixed gear, 40 is a tension gear, 27 is a chain, and the passive gear 24 is in the direction of the arrow (front direction of the fuselage).
It is movable in the direction of arrow B (the rear side of the fuselage).

When the chain 27 is rotated at the moving speed T in the direction indicated by the arrow C, the passive gear 24 is rotated at the speed T.
Can be regarded as being pulled backward.

In this state, when the passive gear 24 is moved at the speed t in the direction of arrow B, the force for rotating the passive gear 24 is generated by "speed T-speed t" (the chain 27 is driven by the passive gear 24).
Since the direction in which is pulled backward and the direction in which the passive gear 24 moves back and forth are substantially parallel, the description will be made assuming that “speed T−speed t”).

Therefore, when “speed T−speed t” is positive,
Although the problem of the chain loosening does not occur, when the “speed T−speed t” is negative, the passive gear 24 moves too fast and the driving force of the chain 27 is not transmitted to the passive gear 24, so that the passive gear 24 is not transmitted. Continues to rotate due to inertia, the rotation gradually decreases, and at the same time, the chain 27 in the portion C between the passive gear 24 and the drive gear 26 starts to loosen, and in the worst case, the chain 27
However, since the passive gear 24 continues to rotate due to inertia, the slack cannot be absorbed by the tension gear 40.

Thus, when the passive gear 24 is moved at the speed t in the direction of arrow A, the chain 27 does not slack due to the action of the tension gear 40 during the movement. However,
Considering the rotation of the passive gear 24, in order for the passive gear 24 to move in the direction of arrow A, the chain 27 of the portion A is sequentially sent out to the portion C while pulling the tension gear 40. However, the passive gear 24 is additionally rotated, and its peripheral speed R3 is equal to “speed T + speed t”. That is, when the passive gear 24 moves in the direction of arrow A, the passive gear 24 rotates at an increased speed during that time.

For this reason, when the movement of the passive gear 24 in the direction of arrow A is completed, the inertial
R3 becomes larger than the speed T, and the amount by which the passive gear 24 sends out the chain 27 becomes larger than the amount by which the drive gear 26 winds the chain 27, so that the chain 27 is slackened.

Further, the configuration described in Japanese Utility Model Application Laid-Open No. 63-122028 requires a powder clutch mechanism, which complicates the structure, and when the movement of the reel is completed, the drive gear is replaced with the passive gear by a chain. There is another problem that the speed of feeding increases and the chain moving upward moves loose, and the timing of returning the rotation of the drive gear is very difficult, so it is quite difficult to control the drive gear and change the speed to remove the slack. There is a problem that it is difficult.

In addition, since a tension spring is provided between the tension arm and the fixed position of the reel support arm, the tension spring is urged in a direction to increase the center distance between the tension gear and the passive gear.
When the tension gear moves due to a change in the winding circumference of the chain accompanying the movement of the reel, the tension of the tension spring changes. As a result, the tension of the chain cannot be kept constant, the slack of the chain is promoted, and the chain is easily detached.

[Means for solving the problem]

The present invention employs the following technical means in order to solve the above-described problems.

That is, a driving gear 26 disposed on the base side of the reel support arm 21, a fixed gear 39 pivotally supported at an intermediate portion of the reel support arm 21, and pivotally pivotally attached to an intermediate portion of the reel support arm 21. The chain 27 is wound around a tension gear 40 pivotally supported by a tension arm 41 and a passive gear 24 of a squeeze reel 8 bearing on a support member 22 which can move back and forth with respect to the reel support arm 21.
Between the tension gear 40 and the passive gear
A biasing mechanism 42 for biasing in a direction to increase the distance between the shafts with the shaft 24 is provided, the support member 22 is configured to be adjustable in the longitudinal direction by a reel longitudinal adjusting cylinder 23, and the moving speed of the chain 27 is T. When the moving speed of the support member 22 in the longitudinal direction of the reel longitudinal adjusting cylinder 23 is represented by t, the relationship t <T is satisfied.

〔The invention's effect〕

The present invention includes a drive gear 26 disposed on the base side of the reel support arm 21, a fixed gear 39 pivotally supported at an intermediate portion of the reel support arm 21, and a pivotally pivotable pivot at the intermediate portion of the reel support arm 21. A tension gear 40 pivotally supported by the tension arm 41 attached thereto, and a passive gear of the scraping reel 8 bearing on a support member 22 movable back and forth with respect to the reel support arm 21.
And a biasing mechanism for biasing the chain 27 between the tension arm 41 and the supporting member 22 in a direction to increase the axial distance between the tension gear 40 and the passive gear 24.
42, the support member 22 is a cylinder for adjusting the front and rear of the reel.
23, the front and rear movement can be freely adjusted by T, and when the movement speed of the chain 27 is T and the front and rear movement speed of the support member 22 by the reel front and rear adjustment cylinder 23 is t, the relationship is t <T. Because of the characteristic of the squeeze reel in the combine, the tension of the chain 27 is stabilized by devising the tension mechanism, and the forward and backward movement speed t of the support member 22 bearing the squeeze reel 8 and the movement speed T of the chain 27.
With this relationship, the chain 27 is prevented from loosening, whereby the chain 27 can be prevented from coming off the gears, and a combine scraping reel capable of performing a stable operation can be provided.

[Embodiment of the invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a combine frame, 2 is a traveling device provided below the frame 1, 3 is a threshing device provided above the frame 1, 4 is a threshing room of the threshing device 3, and 5 is provided below the threshing room 4. There are wind selection rooms.

A cutting section 6 is provided on the front side of the automatic feeding type threshing apparatus 3. Reference numeral 7 denotes a weed body of the cutting unit 6, reference numeral 8 denotes a raking reel for scraping the grain culm weeded by the weed body 7, reference numeral 9 denotes a cutting blade, reference numeral 10 denotes an auger for collecting the harvested cereal stem, and reference numeral 11 denotes an auger 10 for collecting. This is a conveying device for supplying the culm to the threshing room 4.

The reaper 6 is vertically movably mounted about an upper rotating shaft 12 of the transfer device 11, and the reaper 6 is mounted on the transfer device 11 so as to be freely rollable.

14 is a horizontal rotation axis of the scraping reel 8;
A pair of frames 13 is fixed to both left and right sides of the frame 14. The frame 13 is provided with mounting plates 15 fixed to the left and right sides of the horizontal rotation shaft 14.
A plurality of arm rods 16 projecting radially from the mounting plate 15,
It consists of a reinforcing rod 17 that connects the tip of each arm rod 16,
It has a polygonal shape. A rotating horizontal shaft 20 to which a reel tine 19 is attached is rotatably fixed to a boss 18 at the tip of the arm rod 16.

The left and right ends of the horizontal rotation shaft 14 of the scraping reel 8 are laterally protruded through the mounting plate 15, and the protruding portion is axially fixed to a mounting member (support member) 22. Reference numeral 21 denotes a pair of left and right mounting arms (reel supporting arms) rotatably fixed to the auger chamber side of the mowing unit 6, and the mounting member 22 is movably mounted on a front protruding portion of the mounting arm 21. Reference numeral 23 denotes a cylinder for adjusting the front and rear of the reel. Therefore, when the cylinder 23 is actuated, the mounting member 22 slides on the mounting arm 21, and the front / rear position of the scraping reel 8 with respect to the machine body is adjusted.

24 is a passive gear fixed to one end of the horizontal rotation shaft 14, 26 is a driving gear, 39 is a fixed gear, 40 is a tension gear,
Stir the chain 27 with each gear. The tension gear 40
Is mounted on the upper end of the tension arm 41, and the lower end of the tension arm 41 is rotatably mounted on the mounting arm 21. At the upper end of the tension arm 41, a front end of a spring (biasing mechanism) 42 that constantly biases the tension arm 41 rearward is locked. The rear end of the spring 42 is provided at the front end of the mounting rod 43 in the front-rear direction, and is axially fixed to the rear end of the mounting rod 43 above the mounting member 22.

A large-diameter gear 28 is fixed to a rotation shaft 25 of the drive gear 26. Reference numeral 29 denotes a drive transmission gear, which stirs the chain 30 between the drive transmission gear 29 and the large-diameter gear 28. The rotation shaft 32 of the drive transmission gear 29 is connected to the input shaft 33 of the transmission case 31 via a transmission mechanism.
Connected to. The transmission case 31 includes the scraping reel 8.
The power is transmitted from the engine to the cutting blade 9 and the auger 10.

Although not shown, an angle change adjusting frame for adjusting the ground angle of the reel tine 19 is provided outside one of the frames 13 of the pair of frames 13. The angle change adjusting frame is attached to the frame 13 via a parallel link, and the reel tine 19 is maintained at a constant angle with respect to the ground by changing the relative position between the angle change adjusting frame and the frame 13. Rotate.

However, as described above, when the front-rear position of the raking reel 8 is adjusted by expanding and contracting the reel front-rear adjustment cylinder 23, the chain 27 may come loose and come off.

Therefore, when the moving speed of the chain 27 is T and the moving speed of the scraping reel 8 in the longitudinal direction (same as the moving speed of the support member 22) by the reel longitudinal adjusting cylinder 23 is t, the relationship is t <T. By doing so, detachment of the chain 27 is prevented.

(The forward / backward movement speed t of the scraping reel 8 defined here is
Strictly speaking, it is the speed in the direction in which the passive gear 24 of the scraping reel 8 approaches or separates from the drive gear 26. However, the actual forward and backward movement direction of the passive gear 24 and the passive gear 24 Since the directions approaching or moving away from are substantially parallel to each other, they are simply expressed as a front-rear moving speed t. The speed t of moving the scraping reel 8 back and forth is made slower than the moving speed T of the chain 27 by controlling the expansion and contraction speed of the cylinder 23 for adjusting the front and rear of the reel.

 Next, the operation will be described.

The present invention is configured as described above, and when the body is driven by the traveling device 2, the culm in the field is scraped by the reel tine 19 of the raking reel 8 rotating, and the root of the culm is separated by the weeding body 7. Grass stalks that have been weeded and weeded are cut by a cutting blade 9, and the cut stalks are collected by an auger 10 and transported by a conveying device 11.
Is supplied to the threshing room 4 of the threshing device 3 and threshed.

In order to improve the operation efficiency of the raking reel 8 depending on the state of the grain culm in the field, the mounting member 22 is slid on the mounting arm 21 by the expansion and contraction of the reel longitudinal adjusting cylinder 23, and the raking is performed. The front-rear position of the reel 8 with respect to the machine body may be adjusted.

Hereinafter, the adjustment of the front and rear positions of the scraping reel 8 and the loosening of the chain 27 will be described.

Assuming that the peripheral speed of the tension gear 40 is R1, the peripheral speed of the drive gear 26 is R2, and the peripheral speed of the passive gear 24 is R3, R1 = R2 = R3 =
At the moving speed T of the chain 27, the scraping reel 8 is rotating in the direction of arrow C.

When the rotating scraping reel 8 is moved rearward (in the direction of arrow B), the moving speed T of the chain 27 is faster than the forward and backward moving speed t of the passive gear 24, and the chain loosened by the movement of the passive gear 24.
Since the amount of the chain 27 wound by the drive gear 26 is larger than the amount of the chain 27, the chain 27 of the portion A does not slack as in the known example.

Next, when the passive gear 24 is moved forward (in the direction of arrow A) at the speed t, the chain 27 does not slack due to the action of the tension gear 40 during the movement. At this time,
Considering the rotation of the passive gear 24, in order for the passive gear 24 to move in the direction of arrow A, the chain 27 of the portion A is sequentially sent out to the portion C while pulling the tension gear 40. The passive gear 24 rotates extra, and its peripheral speed R3 becomes equal to "speed T + speed t". That is, when the passive gear 24 moves in the direction of arrow A, the passive gear 24 rotates at an increased speed during that time.

However, since the speed t is lower than the speed T, when the movement of the passive gear 24 in the direction of arrow A is completed, the peripheral speed of the passive gear 24 rotating at an increased speed due to inertia.
R3 is much slower than in the prior art, so that the amount of the passive gear 24 sending out the chain 27 is significantly reduced, and the chain 27 is wound around the drive gear 26 before a serious problem occurs.

Therefore, the forward and backward moving speed t of the scraping reel 8 is changed
If the moving speed is lower than the moving speed T of the chain 27, the chain 27 can be prevented from coming off the gear.

[Brief description of the drawings]

1 is an overall left side view, FIG. 2 is a right side view of the same, FIG. 3 is a side view of a scraping reel portion, and FIGS. 4 to 6 are operation explanatory views. 1 ... frame, 2 ... traveling device, 3 ... threshing device, 4
... threshing room, 5 ... wind selection room, 6 ... cutting section, 7 ... weeding body, 8 ... scraping reel, 9 ... cutting blade, 10 ... auger, 11
…… Transfer device, 12 …… Upper rotating shaft, 13 …… Frame, 14
… Horizontal rotation axis, 15… Mounting plate, 16… Arm rod, 17… Reinforcement rod, 18 boss, 19… Reel tine, 20… Rotating horizontal axis, 21… Mounting arm, 22… … Mounting member, 23 reel front / rear adjustment cylinder, 24… Passive gear, 25… Rotary shaft, 26…
... Drive gear, 27 ... Chain, 28 ... Large-diameter gear, 29 ... Drive transmission gear, 30 ... Chain, 31 ... Transmission case, 32 ...
Rotary shaft, 33 Input shaft, 39 Fixed gear, 40 Tension gear, 41 Tension arm, 42 Spring, 43
… Mounting rod

Claims (1)

(57) [Claims] 1. A drive gear 26 disposed on the base side of a reel support arm 21, a fixed gear 39 pivotally supported at an intermediate portion of the reel support arm 21, and a swingable pivot at an intermediate portion of the reel support arm 21. A tension gear 40 pivotally supported by a pivotally mounted tension arm 41; and a passive gear of a scraping reel 8 bearing on a support member 22 which is movable back and forth with respect to the reel support arm 21.
And a biasing mechanism for biasing the chain 27 between the tension arm 41 and the supporting member 22 in a direction to increase the axial distance between the tension gear 40 and the passive gear 24.
42, the support member 22 is a cylinder for adjusting the front and rear of the reel.
23, the front and rear movement can be freely adjusted by T, and when the movement speed of the chain 27 is T and the front and rear movement speed of the support member 22 by the reel front and rear adjustment cylinder 23 is t, the relationship is t <T. Scraping reel for combine.