JP3180363B2 - Combine retractor front and rear position adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the position of a combine reel in the longitudinal direction.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Laid-Open Publication No. Hei 3-27213 discloses that a center axis of lateral rotation of a scraping reel is mounted via a right cylinder and a left cylinder so as to move back and forth with respect to a pair of left and right mounting arms. Things are listed.

[0003]

The above-mentioned known example describes a structure in which the squeezing reel is moved back and forth by a right cylinder and a left cylinder, but two left and right cylinders are attached, and an oil passage is respectively arranged. Therefore, there is a problem that the structure becomes complicated.

[0004]

The object of the present invention is to simplify the structure.

[0005]

Therefore, according to the present invention, the lateral rotation center shaft 13 of the scraping reel 8 is moved to a pair of left and right mounting arms 2.
The hydraulic circuit of the left and right cylinders 21 and 22 is attached to a series oil supply circuit extending from one of the left and the other cylinder to the other of the two cylinders. This is a device for adjusting the position of the combined scraper reel in front and rear.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Is a combine frame, 2 is a traveling device provided below the frame 1, 3 is a threshing device provided above the frame 1,
Reference numeral 4 denotes a threshing room of the threshing device 3, and 5 denotes an air selection room provided below the threshing room 3. A mowing part 6 is provided on the front side of the threshing device 3. Reference numeral 7 denotes a weed body of the cutting unit 6, 8 denotes a raking reel for scraping the culm culled by the weed body 7, 9 denotes a cutting blade, 10 denotes an auger for collecting the cut culm, and 11 denotes an auger 10 for collecting. This is a conveying device for supplying the pestle to the threshing room 4. The reaping unit 6 is attached to the combine 1 on the frame 1 side so as to be vertically movable, and 12 is a reaping unit vertical cylinder.

Reference numeral 13 denotes a horizontal rotating shaft of the scraping reel 8, and a pair of frames 1
4 is fixed. The frame 14 has a polygonal shape by connecting the distal ends of a plurality of radially protruding arm rods 15 with reinforcing rods 16. The tip of the arm 15 has a reel tine 1
The rotatable horizontal shaft 18 in the left-right direction, to which the device 7 is attached, is rotatably fixed to the shaft. The left and right ends of the horizontal rotation center shaft 13 of the scraping reel 8 are fixed to bearing members 19. Bearing member bearing member 19 is mounted movably back and forth on the front side of the pair of left and right mounting arm 20, the base side of the mounting arm 20 is Jikutome rotatably on the frame side of the cutting unit 6.

The bases of a right cylinder 21 and a left cylinder 22 for adjusting the front and rear positions of the scraping reel 8 are attached to the left and right mounting arms 20, respectively.
The tip of the second rod 23 is attached to each bearing member 19. The cylinders 21 and 22 are of a double-acting type, and extend and contract to adjust the front and rear positions of the raking reel 8 in accordance with the state of the grain culm in the field. Reference numeral 24 denotes the right front chamber of the right cylinder 21, 25 denotes the right rear chamber, 26 denotes the left front chamber of the left cylinder 22, 27 denotes the left rear chamber, and 28 denotes the left and right cylinders 21 and 22.
The hydraulic circuits of the left and right cylinders 21 and 22 are connected in series so that oil is supplied from one of the right cylinder 21 and the left cylinder 22 to the other.

That is, in the case of this embodiment, the left and right cylinders 2
As shown in FIG. 2, the hydraulic circuits 1 and 22
, An oil pump 30 is connected to the switching valve 31, and the switching valve 31 is connected to the right cylinder 21,
21 is connected to the expansion / contraction switching valve 32. Between the telescopic switching valve 32 and the right rear chamber 25 of the right cylinder 21, a right cylinder oil passage 33 extending from the telescopic switching valve 32 to the right rear chamber 25 is formed. The right front chamber 24 of the right cylinder 21 and the left rear chamber 27 of the left cylinder 22 are connected by an intermediate oil passage 34. Left front chamber 26 of left cylinder 22 and telescopic switching valve 32
And are connected by a left cylinder oil passage 35. In addition,
Conversely, the oil pump 30 is connected to the left rear chamber 27 of the left cylinder 22, the left front chamber 26 of the left cylinder 22 is connected to the right rear chamber 25 of the right cylinder 21, and the right front chamber 24 of the right cylinder 21 is connected to The oil tank 29 may be connected, and the left and right cylinders 21 and 22 may be mounted on either the front or rear side of the bearing member 19.

Since the scraping reel 8 is rotating in the direction A as shown in FIG. 4, the reaction force of this rotation acts to constantly advance the scraping reel 8. When the scraping reel 8 is moved forward, the pistons of the left and right cylinders 21 and 22 are fixed.
Is moved by hydraulic pressure due to the reaction force of the scraping reel 8.
Move more than momentum .

[0011] where, the oil passage in the return lead from the right cylinder 21 or the left cylinder 22 is formed when the elongated also to shrink so that the right cylinder 21 and the left cylinder 22 to advance the scraping reel 8 to the oil tank 29 the, Ru provided the flow limiting valve 36 which limits the oil return flow.

In the case of this embodiment, when the scraping reel 8 is moved to the front side, the expansion / contraction switching valve 32 is switched.
The oil pump 30 feeds oil from the expansion / contraction switching valve 32 through the right cylinder oil passage 33 to the right rear chamber 25 of the right cylinder 21 to extend the rod 23 of the right cylinder 21, and at the same time, by the piston 28 of the right cylinder 21. Right front chamber 24 compressed
The oil in the oil tank 2 is supplied to the left rear chamber 27 of the left cylinder 22 through the intermediate oil passage 34 and extends the rod 23 of the left cylinder 22.
9 corresponds to the return oil passage,
The flow restriction valve 36 is provided in the left cylinder oil passage 35. Reference numeral 37 denotes a throttle of the flow restricting valve 36, and reference numeral 38 denotes a check valve.

The flow restricting valve 36 may be of any construction, and may be merely the throttle 37. Further, in the present embodiment, the throttle restrictor 39 is also provided in the right cylinder oil passage 33 in relation to the oil flow rate. In this case, the relation between the flow restriction valve 36 and the flow resistance of the restrictor 39 is as follows. Flow restriction valve 3
6> Stop 39 In the figure, reference numeral 40 denotes a drive gear that rotates upon transmission of power of the fuselage, 41 denotes a passive gear provided at one end of the horizontal rotation center shaft 13, 42 denotes a chain, and 43 denotes a reel vertical cylinder.

[0014]

Next, the operation will be described. The present embodiment has the above-described configuration, and when the body is driven by the traveling device 2, it is scraped by the reel tine 17 of the raking reel 8 rotating the culm in the field, and the root of the culm is separated by the weeding body 7. Grain culms that have been grassed and weeded are cut by a cutting blade 9, and the cut culms are collected by an auger 10, supplied to a threshing room 4 of a threshing device 3 by a transport device 11, and threshed.

According to the condition of the culm in the field, the right and left cylinders 21 and 22 are simultaneously expanded and contracted, and the bearing member 19 is slid with respect to the mounting arm 20 in order to improve the operation efficiency of the scraping reel 8. The front / rear position of the scraping reel 8 with respect to the machine body is adjusted. In particular, in the case of lodging grain, the scraping reel 8 is moved to the front side. That is, when the expansion / contraction switching valve 32 is switched to the extension side, oil is sent from the expansion / contraction switching valve 32 to the right rear chamber 25 of the right cylinder 21 through the right cylinder oil passage 33 by the oil pump 30.
At the same time, the oil compressed by the piston 28 of the right cylinder 21 flows into the left rear chamber 27 of the left cylinder 22 through the intermediate oil passage 34 and the left cylinder 2
The second rod 23 is extended to move the scraping reel 8 forward, and the oil in the left front chamber 26 of the left cylinder 22 is returned to the oil tank 29 through the left cylinder oil passage 35.

In this case, the reaction force of the rotation of the scraping reel 8 is:
Than acting to advance the scraping reel 8, sent
It moves forward more than oiled, and normal adjustment is not possible.

In this embodiment, the left front chamber 26 of the left cylinder 22 is used in the hydraulic circuit for moving the scraping reel 8 forward.
The flow restricting valve 36 is provided in the left cylinder oil passage 35 serving as a return oil passage from the oil tank 29 to the oil tank 29. Therefore, the rapid flow of oil due to the reaction force of the scraping reel 8 is prevented by the flow restricting valve 36. . Therefore, the right cylinder 21 and the left cylinder 22 are simultaneously extended by the same amount, and the scraping reel 8 is rotated at an accurate position so as to operate reliably.

[0018]

According to the present invention, the lateral rotation center shaft 13 of the scraping reel 8 is mounted via a right cylinder 21 and a left cylinder 22 so as to move back and forth with respect to a pair of left and right mounting arms 20, 20. The hydraulic circuit of the cylinders 21 and 22 is a combine scraper reel front / rear position adjusting device formed in a serial oil supply circuit extending from one of the cylinders to the other. The front-rear position can be adjusted, and the scraping reel 8 has an effect of reliably and smoothly acting on the grain stem.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a hydraulic circuit diagram.

FIG. 3 is a plan view of a main part.

FIG. 4 is an explanatory view of rotation of a scraping reel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Threshing room, 5 ... Wind selection room, 6 ... Cutting part, 7 ... Weeding body, 8 ... Scrape reel, 9 ... Cutting blade, 10 ... Auger, 11 ... transport device, 12
... Mowing part vertical cylinder, 13 ... Horizontal rotation center axis, 14 ... Frame, 15 ... Arm rod, 16 ... Reinforcement rod, 17 ... Reel tine, 18 ... Rotation horizontal axis, 19 ... Bearing member, 20 ... Mounting arm, 21 ... Right cylinder, 22 left cylinder, 23 rod, 24 right front chamber, 25 right rear chamber, 26 left front chamber, 27
... left rear chamber, 28 ... piston, 29 ... oil tank, 30 ... oil pump, 31 ... switching valve, 32 ... expansion and contraction switching valve, 3
3 ... right cylinder oil passage, 34 ... middle oil passage, 35 ... left cylinder oil passage, 36 ... flow restriction valve, 37 ... throttle, 38 ... check valve, 39 ... throttle, 40 ... drive gear, 41 ... passive gear,
42 ... Chen, 43 ... Cylinder for reel up / down.

Claims (1)

(57) [Claims] 1. A horizontal rotation center shaft 13 of a scraping reel 8 mounted via a right cylinder 21 and a left cylinder 22 so as to move back and forth with respect to a pair of left and right mounting arms 20, 20. And 22, the hydraulic circuit of the combine is a squeeze reel front / rear position adjusting device formed in a serial oil supply circuit extending from one to the other.