FI88771C - Flishugg avsedd att kopplas till en traktor - Google Patents

Description

1 88771

Wood chipper to be connected to the tractor

The invention relates to a wood chipper which is arranged to be attached to the rear of a tractor, the rear end of the tractor having a power take-off shaft and lifting arms. The tractors lift the wood chippers and move them for use on the ground.

There are two types of such hackers. In the second type 10, the chipper units are connected directly to the PTO shafts. This type of chipper has the disadvantage that the rotation speed of the chipper unit is limited to the shaft speed.

Another type of chipper uses a belt drive, which allows the speed of the 15 chipper units to be substantially increased, thus allowing more energy to be stored in it. In such chippers, the belt drive unit is located between the tractor and the chopper unit.

20 The weight of a wood chipper is an important factor, and in general the power of a wood chipper increases with its weight. Assuming the capabilities of an agricultural tractor such as a Ford 8N or John Deere 1050 to lift a wood chipper, the weight transferred from the front wheel to the rear wheel can lead to difficult tractor control and increase the risk of tipping over on uneven terrain or steep slopes. With larger and more powerful tractors, it is also not possible to move wood chippers large enough to chop efficient whole wood.

In the present invention, it is found that in wood chippers using a belt drive for chipping units, the problem is substantially in the distribution of weight. Accordingly, the object of the invention is to provide light wood chippers which were not previously suitable for use with a specified tractor for safe and efficient use.

According to the invention, this object is achieved by providing a wood chipper, wherein said chipper is intended to be lifted by said arms and transported by a tractor, said chipper comprising a front and rear housing and a rack supporting both housings under said front housing, to which said arms can be connected, the front housing is located near the tractor when the chipper is connected to it and is equipped with chip removal, a driven shaft extending through the front housing and the rear housing, bearing units on opposite sides of the front housing, axle support units on the front housing and an axle mounted on said front housing equipped with cutting blades which expose to the rear thereof and with wings acting to remove the chips through said discharge, a drive shaft connectable to the power take-off shaft of the tractor, extending below the front housing and rotatably supported by the rear housing, the rear housing a belt drive connecting the 15 drive and drive shafts, and a wood feed containing a chute leading at an acute angle to the rear side of the chipper unit to the front housing, the feed end of which is located near the rear of the wood, a second roll moving towards or away from the second roll, and a hydraulic drive for both rollers, said drive including a pump driven by one of said belts connected by belts.

25 By placing the relatively heavy chipper unit and housing forward compared to the previous one, it is now possible to safely use chipper weights which were not previously possible. By placing the belt drive housing behind the chipper, it is possible to use a relatively long articulation 30 to the tractor's PTO shaft, thus allowing a large range of movement of the chipper relative to the tractor without producing excessive angles to the joint. The drive of the belt both causes the desired speed of the harvester unit to be increased so that the power take-off bypasses the main part of the front housing.

35

Another object of the invention is to increase the efficiency of the chipper unit. This object is achieved by a unit with a non-liquid front member to which a circular rear member is connected by 3,87771 blades of a chipper, which also act as an intermediate. The circular member comprises two segments, which are held in the middle so that the segments are concentric, the gap between them being divided on the drive shaft into two radial slots, the wings flanking the leading edges of which extend substantially along the entire length of both slits. The blades line the other edges of the slits.

Such a chipper unit has several advantages, as it allows the use of full-length chipper blades, whereby a four-member member is able to throw chips and act as a fan. In addition, bolt holes are used to secure the wings and segments in the square member to the radial pattern from the shaft receiving hole to the corners. The strength of the ne-15 lamellar member is then affected much less than it would be in the case of a circular member.

The chipper unit is preferably as large and heavy as possible, because the larger the radius of the circular plate, the longer and heavier the blades can be used. The heavier the chipper unit is, the more energy it can store and the less the chipper is used to vibrate and vibrate.

Other objects and ways to achieve them will be apparent from the following description of the preferred embodiment and the appended claims.

The accompanying drawings illustrate a preferred embodiment of the invention in which:

Figure 1 is a side view of the chipper;

Figure 2 is a rear view of the chipper; 35

Fig. 3 is a section on an enlarged scale, partially taken along line 3-3 of Fig. 1; 4,88771

Figure 4 is a sectional view taken along line 4-4 of Figure 3;

Fig. 5 is a view taken along line 5-5 of Fig. 4;

Fig. 6 is similar to Fig. 5, but with the side wall of the intake housing cut away to show the connection between the intake rollers and the upper intake roll and the shock absorber 10;

Figure 7 is a section on an enlarged scale, halfway along line 7-7 of Figure 2; Fig. 8 is a sectional view taken along line 8-8 of Fig. 7; and

Fig. 9 is a further enlarged view, halfway along line 9-9 of Fig. 8.

The wood chipper according to the invention is adapted for use in a tractor 10 with a power take-off shaft 11 and lifting arms 12 and 13. Since such tractors and their functions are well known, the tractor 10 will not be described further.

25 The housing 14 includes a wood chipper unit, generally referred to as 15 in Figures 7 and 8, and is supported by the legs of the rack 16. On the front side of the housing 14, i.e. on the side facing the tractor 10, when the chipper is placed for use by the tractor, a support 17 is mounted on the other end of the shaft 19 along the shaft 19, which shaft extends through the housing 14 and in which the wood chipper unit 15 is mounted, as well as through the bearing 20, in a housing 21 provided with a removable cover 22. The housing 21 and the bearing 20 are supported by a support 23 fixed to the other side, i.e. the rear side, of the housing 14.

5,88771

In housing 21, see Figures 2 and 7, there is a pulley 24 attached to the end of the shaft 19, around which the belt is guided around a pulley 25 located near the open bottom of the housing 21. The belt drill 25 is attached to a pin shaft 27 which is mounted on a bearing 28 attached to the angle irons 29. The second angle iron 29 is welded to a support 30 attached to the front wall of the housing 21, the second angle iron 29 being welded to a support 30 attached to one of the housing 21. the wall. The body of the hydraulic pump 31 is attached to the upper end of the latter angle iron and connected freely to the shaft 19 on which it is to be used.

Generally shown power shaft 32, cf. Fig. 1, is connected by a hinge connection 33 to the tractor's PTO shaft 11 by a knurled connector 34 and a similar hinge connection to the shaft end 27. The power shaft 32 comprises telescopic sections 32A and 32B. The portion 32A has a square cross-section and slidably fits into a square hole passing through the fitting 20 32C, which fitting is welded to the end of the portion 32B, which in turn may be the length of the tube. When the wood chipper has been moved to the work site by the tractor and lowered to the ground, the power shaft 32 is connected to the PTO shaft of the tractor, both the wood chipper unit 15 and the hyd-25 wind pump 31 are ready for operation. As noted above, with the drive housing 21 behind the chipper, the power shaft 32 is remarkably long and allows the chipper a wide range of motion relative to the tractor without producing an excessive bending angle of the articulation 33.

30

Before describing the wood chipper 15 in detail, the means by which the wood is fed into it will be explained. The feed chute 35 has a funnel-shaped inlet 36 for feeding small logs, ribs and twigs into the chipper unit 15. The chute 35 35 leads at an acute angle to the lower part of the rear of the housing 14, and at the connection point there is a removable wear plate 35A, and there is a lower feed roller 6. 88771 bearings 38 mounted on the side walls of the trough 35 supporting its shaft 39. The upper take-up roll 40 is mounted on a shaft 41 extending through curved slots 42 in the walls of the trough 35, the bearings 43 supporting its ends. The molar bearings 43 are connected by supports 44 to the respective side arms 45 and 46 of the support 47 extending through the slots 42 of the roll 40. The arm 45 is pivotally connected at 48 to the rear of the housing 14, and the arm 46 is pivotally connected to a shock absorber 50 pivotally 10. connected to the housing 14 by a welded support 51, and which resists the upward movement of the upper take-up roll 40.

The forward ends of the shafts 39 and 41 are connected to hydraulic motors 52 and 53, respectively, whereby the body of the motor 15 52 is supported by a support 54 mounted in front of the feed chute 35. The body of the motor 53 is supported by a support 55 on the arm 46.

The feed rollers 37 and 40 are driven by a pressurized fluid 20 which is fed to the hydraulic motors 52 and 53. For this purpose, the inlet of the pump 31 is connected to the tank 56 and its outlet is connected to the outlet 58 and to the flow control valve 57. an outlet line 59 connected to a directional control valve 60 having a return line 61 connected to the return line 58 via the valve 57. The lines 62 and 63 from the valve 60 are connected to the hydraulic motors 52 and 53, and the line 64 connects the motors, rotating the rollers 37 and 40 depending on the position of the valve 60. already in the direction in which the substance to be chipped is fed to the chipper housing 14, or in the opposite direction. It will be appreciated that the flow control valve 57, which allows pressurized oil to be fed to the adjustable directional control valve 60, allows the rotation speed of the feed rollers to be varied in certain operating situations. The feed rate of the substance to the chipper housing 14 must be controlled 7 88771 to ensure maximum production without generating too much frictional heat.

The take-up roll 37, see Fig. 4, is provided with a series of circumferentially gripping short gripping ribs 65 extending in its longitudinal direction, the ribs of each set being spaced apart and offset to the side relative to the adjacent sets. The feed roller 40 is provided with two circumferentially respective sets of toothed blades 66 and 67, the teeth of the blades 67 being larger than the teeth of the blades 66.

Wood chipper unit 15, see Figures 7-9 show a square load carrying plate 68 with a hub 69 bolted to the front and welded to the shaft 19. The blade holding plate 70 comprises two identical curved blocks 70A and 70B extending nearly but not exactly 180 degrees. Blocks 70A and 70B, secured to the rear of the plate 68 via spacer bars 71, have the same span and have gaps 72 therebetween. Each block 70A, 70B is secured to the load bearing plate 68 by a set of bolts 73 extending a distance from the load bearing plate 68. 71, and which bolts are screwed into the holes 25 in the respective blade-bearing plate block 70A, 7OB. Thus, one distance bar 71 is attached to the rear edge of each block 70A, 70B, and it is noted that each bar 71 is located at a right angle to adjacent bars and that all bars are arranged circumferentially at the same distances. Each set of bolts 73 30 extends to the corner of the load bearing plate 68. The load-bearing plate 68 is substantially thicker and correspondingly heavier than the blade-bearing plate 70. With both plates removably attached and both having different functions, the unit 15 is well equipped to meet the assembly requirements and maintenance needs of 35.

8 88771

It will be appreciated that the rods 71 extend beyond the periphery of the plate 70 and the corners of the plate 70, and act as chip ejectors, like both rods 74 attached to the front of the plate 68. Both rods 74 are parallel and are located at the rear edge of the respective two rods 71, the rods 71 being at right angles to the slots 72.

The direction of rotation of the chipper unit 15 is indicated in Figure 8 by an arrow 10-10. At the edge of each slot 72 and extending along its entire leading edge is a chopping blade 75. As best seen in Figure 9, each blade is positioned against the chamfered surface 76 of the leading edge of the respective block 70A, 70B and is provided with a series of longitudinal slots 77 marked 15 and each of which extends through a support screw 78 threaded into a locking bar 79 between its bevelled edges. Each blade 75 is supported by a stop bar 80 which is locked to the respective block 70A, 70B by cap screws 78.

20

The wood is fed at an angle against the exposed surface of the rapidly rotating plate 70, the blades 75 cutting it, whereby the chips enter the space between the plates 68 and 70 and are subjected to an acting centrifugal force. The chips thus run towards and into the vertical outlet 81 and to be removed laterally therethrough through the trough 82, cf. Fig. 2, which is pivotally connected to the opening 81 so that the chip removal direction can be controlled.

30 Note that the upper side at one end of the housing is hinged to the lower end at the other end at 83, cf. Fig. 8, wherein one end thereof is releasably locked to the lower portion by bolts 84 extending through the flanges 85, the flanges being in each case secured to each portion of the housing 14.

9 88771

From the above, both the structure of the chipper and its operation are obvious, as well as the characteristics with which the chippers according to the invention are well suited to meet the requirements of production, use and maintenance.

Claims (10)

10 8877 " A wood chipper adapted to be attached to the rear end of a tractor (10), the rear end of the tractor having a power take-off (11) and lifting arms (12, 13), characterized in that said chipper is intended to be lifted by said arms (12). , 13) and for transport by a tractor (10), said chipper comprising a front and rear housing (14, 21) and a front housing (16) supporting both housings below the front housing to which said arms (12, 13) can be connected, whereby the front housing (14) is located near the tractor when the chipper is connected to it and is equipped with a chip removal (81), a driven shaft (19) extending through the front housing (14) and the rear housing (21), axle bearing units (18, 20) on opposite sides of the front housing, in the front housing (14) of a chipper unit (15) attached to said driven shaft (19) and provided with cutting blades (75) exposed on its rear side and blades (71) operating to remove I do not chip through the outlet (81), a drive shaft (32) connectable to the tractor's PTO shaft (11), extending below the front housing (14) and rotatably supported by the rear housing (21), a belt drive (26) in the rear housing connecting the drive and a drive shaft, as well as a wood chute, which includes, at a sharp angle to the rear side of the chipper unit, a chute 25 (35) leading to the front housing, the feed end of which is located near the rear unit but to the side of said wood core. the second roll (40) moving towards the second roll (37) or away from the second roll, and a hydraulic drive (52, 53) for the two rollers, said drive comprising a pump (31) one of said axes connected by the belts ( 19) use. 2. A method according to claim 1, which can be shown in Fig. 15 on a frame (14) as a set for a station (16), and in a construction (23) on a frame in a frame (14) on a frame (14). 21) och innehåller utloppsåndan. of the official accounts. Wood chipper according to claim 1, characterized in that the front housing (14) is connected to a rack (16), and that the structure (23) attached to the rear end of the front housing (14) supports the rear housing (21) and includes a wood intake outlet end. 8877 11 ' 3. A method according to claim 1, which comprises a plurality of body parts (15) and a square quadrant body (68), a ring (71, 74) in the middle of the body, the colors of the round body of the body being transverse to the body. riktade springor, varvid for varje 25 springa ett flishuggarbett (75) аr monterat for att avlågsna flis som losgjorts i dess långdriktning till utrymmena mel-lan vardera organet oc vingarna. Wood chipper according to claim 1, characterized in that the chipper unit (15) comprises wings (71, 74) attached to the members of the rear circular member, the front quadrangular load-bearing member (68), the round ori-5 having a pair of transversely oriented slots, wherein each slit has one chopping blade (75) mounted in its longitudinal direction to remove chips removed in the spaces between each member and the wings. 4. A method according to claim 3, which is shown in Fig. 30 as a transverse element (70A, 70B), which is dimensionally and preferably in the form of a quadratic organ (68) in the form of a transverse organ. parallella, radial spring (72) next to a single axle of the driving axle (19), varvid vingen 35 kantar den bakre kanten av vardera segete and vid fråmre kanten av vardera seget a fat stats et bett (75), som stråcker sig från närrheten from the axis (19) to the periphery of the organ (70). 14 8877 " Wood chipper according to claim 3, characterized in that the circular member (70) comprises two curved segments (70A, 70B) dimensioned and fixed to the quadrangular member (68) so as to form a circular member with transverse ones therebetween. parallel radial slits (72) biased by the driven shaft (19), the wing flanking the rear edge of each segment and a blade (75) extending proximal to the driven shaft (19) from the pyramidal member ( 70) to the ring. 20 5. A method according to claim 4, which comprises an extra spring (71) which is preferably provided with a spring spring (72) and a spring spring from the spring spring (72). 5 Wood chipper according to Claim 4, characterized in that it has two additional blades (71) which are located at right angles to the slots (72) and which are at the same distance from the blades flanking the slots. 25 6. A patent according to claim 5, which comprises a device (71) peripheral to a peripheral organ (70) and a radius of a device outside the frame of a quadrant organ (68) without a horn or 10 strokes. utanfor Hornen. Wood chipper according to claim 5, characterized in that the wings (71) protrude outside the circumference of the circular member (70) and in that a series of wings is fixed to the front surface of the square member (68) near its corners and extends partially outside the corners. 7. A patent according to claim 3, which is shown as having a square organet (68) and a double-ended or double-folded organ (70) and an alternating black ring having a diamond or a diamond. Wood chipper according to claim 3, characterized in that the thickness of the square member (68) is approximately twice that of the round member (70) and the distance between the opposite corners is approximately the same as the diameter of the round member. 12 8877 ' 8. A method according to claim 6, which comprises a spring (72) on the side of the drive (19) outside the 20th row. Wood chipper according to Claim 6, characterized in that the slot (72) on each side of the drive shaft (19) is close but quadrangular in shape at the rear edge of the opposite corners. 5 9. A method according to claim 1, comprising a body comprising a roller (40) for a roller (37) and a boron. från denna innehåller en stotdåmpa-re (50), som motstår och dåmpar sådana roreiser eftergiv-ligt. Wood chipper according to claim 1, characterized in that the means for allowing the second roll (40) to move towards the second roll (37) and away from the second roll comprise a shock absorber (50) which resists and softens such movements. . Wood chipper according to claim 1, characterized in that the rack (16) and the front housing (14) are thus arranged so that the center of gravity of the chipper unit is in a substantially vertical, transverse plane which includes the points of the ends of the arms when connected to the rack. -seen. 20 l Flisuggare, attachable to the tractor in the case of a tractor (10), varvid traktorn vid bakre åndan har en kraft-uttagsaxel (11) och lyftarmar (12, 13), k & nnetecknad av att námmnda flishuggare ør avsedd att lyftas med nn Armar (12, 13) and a transporter with a tractor (10), Medan 25 nånnda flishuggare innehåller en fråmre och en bakre kápa (14, 21) och en stållning (16), som st6der bågge kafporn under den fråmre kåpan, varvid nåmnda Armar (12, 13) can be mounted on a frame (14) of a tractor on a flywheel with a headland and a fork with 30 flaps (81), driven by an axle (19) with a tracker on the frame (14). ) and to the bracket cap (21), the bearing enhancer (18, 20) having a stem axle on the frame cap-sat coupling, and a cross-link (15) and the frame bracket (14), which also has a base to the same axis (19) och år for-35 sedd med flishuggande bett (75) blottas på dess bakre sida, samt vingar (71) with the aid of a fleece via a native end (81), with a drill (32) attached to a tractor with a kraftut tagsaxel (11), with a driveway running under the frame 13 88771 of the frame (14), and with a rotary axle kāpan (21), en remdrift (26) i den bakre kåpan, som forbinder den dri-vande och den drivna axeln, samt stringesinmatning, som inne-håller en rånna (35) som leder till den fråmre kāpan i skarp 5 kinkel mot den bakre sidan av flishuggarenheten, och rånnans matarånda befinner sig i närrenen men på sidan av den bakre enheten, varvid nåmnda string-free innehåller ett par av matarvalsar (37, 40), organ som lâter den forstå waltz (40) 37) or a drift from the shaft, 10 and a hydraulic drift (52, 53) for the roller shaft, a medium drift from the pump (31) to the drives of the shaft (19). 10. A method according to claim 30, comprising a stem (16) and a frame (14) as a placebo, said at the same time as a vertical point on a transverse planet, such as a transverse planet. stållningen.