CA1098758A - Tractor - Google Patents
TractorInfo
- Publication number
- CA1098758A CA1098758A CA267,216A CA267216A CA1098758A CA 1098758 A CA1098758 A CA 1098758A CA 267216 A CA267216 A CA 267216A CA 1098758 A CA1098758 A CA 1098758A
- Authority
- CA
- Canada
- Prior art keywords
- tractor
- bracket
- guide rod
- upper guide
- rotary implement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/04—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor
- A01B59/042—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor having pulling means arranged on the rear part of the tractor
- A01B59/043—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor having pulling means arranged on the rear part of the tractor supported at three points, e.g. by quick-release couplings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
- A01B33/087—Lifting devices; Depth regulation devices; Mountings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
- A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
- A01B63/102—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means characterised by the location of the mounting on the tractor, e.g. on the rear part
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Agricultural Machines (AREA)
- Soil Working Implements (AREA)
Abstract
??????
Abstract of the Disclosure A tractor particularly for use in farming having a rotary plow assembly vertically movably attached to the rear end of its frame and an output shaft on the tractor frame and an input shaft on the plow assembly operatively inter-connected through a transmission shaft and universal joints. Rotation of the output shaft is transmitted to the input shaft at an equal rate for good plowing effect. And the plow assembly can be raised to a considerable height, when not operating, for easy reversal of the tractor and the like.
Abstract of the Disclosure A tractor particularly for use in farming having a rotary plow assembly vertically movably attached to the rear end of its frame and an output shaft on the tractor frame and an input shaft on the plow assembly operatively inter-connected through a transmission shaft and universal joints. Rotation of the output shaft is transmitted to the input shaft at an equal rate for good plowing effect. And the plow assembly can be raised to a considerable height, when not operating, for easy reversal of the tractor and the like.
Description
~3913751~
Backyround of the Inyention 1. Field of the Invention This invention relates to an assembly for attaching a rotary implement such as a plow to a tractor such that the im-plement is vertically movably attached thereto by means of a link mechanism. The tractor may incorporate an arrangement wherein power transmission is effected from an output shaft on ~39~75~
the tractor frame to an input shaft on the plow assembly by way of a rotary transmission shaft with uni~ersal joints disposed at both ends thereof.
Backyround of the Inyention 1. Field of the Invention This invention relates to an assembly for attaching a rotary implement such as a plow to a tractor such that the im-plement is vertically movably attached thereto by means of a link mechanism. The tractor may incorporate an arrangement wherein power transmission is effected from an output shaft on ~39~75~
the tractor frame to an input shaft on the plow assembly by way of a rotary transmission shaft with uni~ersal joints disposed at both ends thereof.
2. Dcscription of the Prior Art For moving the rotary plow assembly up and down relative to the tractor frame by means of a link mechanism, a known link mechanism comprises a substantially parallel quadrilateral arrangement effective to move the plow assembly substantially parallel to the tractor frames This known arrangement is intended for maintaining the output shaft on the tractor frame and the input shaft on the plow assembly which are operatively interlocked with two universal joints substantially parallel at all times irrespective of the position of the plow assembly. That is, in connecting the shafts by means of two universal joints, the rotating rate of the output shaft can be transferred unchangedly to the input shaft, and vibrations and noise can be kept down by substantially uni-formalizing the crossing angles between each of the output and input shafts and the transmission shafts to render the output 20 - and input shafts substantially parallel. It is with this functional advantage in view that ~9~3758 the plow assembly has been raised and lowered with the substan-tially parallel quadrilateral link mechanism.
However, with this arrangement, it is impossible to raise the plow assembly very high above the ground to bring it to an idle position with a parallel quadrilateral link mechanism.
This is inconvenient in turning the tractor to reverse the plowing directions near ridges or driving it over ridges.
Summary of the Invention This invention provides a tractor capable of raising the plow assembly to a considerable height when the latter is idle, while making most of the advantages in the associated action of the output and input shafts.
Accordingly, the present invention provides an assembly for attaching a rotary implement to a tractor, comprising two lower guide rods hinged at one end thereof to the tractor and hinged at the other end thereof to the rotary implement, said lower guide rods extending substantially horizontally in an operating position of the rotary implement, a first upper guide rod hinged at one end to the tractor, a second upper guide rod hinged at one end thereof to the other end of said first upper guide rod, said second upper guide rod being longer than said first upper guide rod and having the other end thereof coupled to said rotary implement, and a connecting rod pivotally connected at one end thereof to said second upper rod at an intermediate point near said one end of said second upper rod, said connecting rod being pivotally connected at the other end thereof to said rotary implement at a point which, in side view, is coincident with points at which the other ends of the lower guide rods are coupled to the tractor, whereby said rotary implement rotates upwardly relative to said lower guide rods as said guide rods are pivoted upwardly relative to the tractor.
~758 By so arranging that the upper and lower guide rods or links of the link mechanism are substantially parallel and the output and input shafts are substantially parallel when the plow assembly is near the ground engaging position, the plow assembly is allowed to move up and down within the operative compass without substantial alterations to such parallel states. That is to say, while in the operative compass, the plow assembly can move up and down without affecting the interlocking function of the universal joints of a transmission shaft providing drive power for the rotary implement. And, by making the upper link shorter than the lower links, with this interlocking function at full play, the plow assembly can be raised to a very high inoperative position for the extent of link oscillation. Thus, during plowing work, the , -4-,~, ., , 37s8 input shaft is driven at the same rate as the output shart to produce very little vibrations and noise, and yet, to the great advantaye of the tractor, the plow assembly can be raised high at the time of reversing the tractor or driving it over ridges.
It is an object of this invention to provide a tractor capable of effecting smooth power transmission to the plow assembly and of raising the plow assembly high above the ground at the time of reversing and the like.
Another object of this invention is to provide a tractor enabling the plow assembly to be mounted at the rear end thereof in a reliable manner with a simple arrangement.
Other objects and advantages will be apparent from the following description.
Brief Description of the Drawings.
In the drawings illustrating tractors according to this invention;
Fig. 1 is a side view of the rear portion of a tractor;
Figs. 2 and 3 are views illustrating a plow assembly at lowered and raised positions, respectively;
Fig. 4 is a view corresponding to Fig. 3 and illustrating the conventional plow assembly at a raised position;
Fig. 5 is a part view in vertical section showing the portion of the tractor mounting the plow assembly;
Fig. 6 is a partly broken away perspective view showing the same portion as in Fig. 5;
Fig. 7 is a rear view in cross section showing another embodiment of the invention; and Fig. 8 is a side view in vertical section showing the known plow asse~bly mounting portion.
Descri~tion of the ~referred Embodiments The mode of practising the invention is hereinafter describcd with reference to preferred embodiments. In Fig. 1, a rotary plow assembly 1 is shown attached to the rear end of a tractor frame 2. The attaching arrangement includes an operative connection between an output shaft 4 protruding from a trans-mission case 3 and an input shaft 6 of plow assembly 1 through an interlocking mechanism 5 as well as a link mechanism 7 and a lift arm 3 for a vertical movement of plow assembly 1.
Interlocking mechanism 5 consists of an axially collapsible transmission shaft 9, a tubular cover 10, and uni-versal joints 11 supported by the ends of tubular cover 10 and connected to the ends of transmission shaft 9. Universal joints 11 are also connected to output shaft 4 and input shaft 6 res-pectively, whereby rotation of output shaft 4 on tractor frame 2 is transferred to input shaft 6 of plow assembly 1 by way of transmission shaft 9.
Link mechanism 7 consists of two lower long links or guide rods 12 pivotally connected to a lower portion of case 3 and a middle portion of plow assembly 1, and an upper short link or guide rod 14 pivotally connected to the rear end of a brasket 13 secured to frame 2 and to a longer upper guide rod 114 which is coupled to the upper end of plow assembly 1. ~hen tractor frame 2 is viewed from its side, lower long links 12 is critically longer than upper short link 14 from pivot to pivot. A free end of lift arm 3 is pivotally connected to long link 12 intermediate the ends thereof by means of a rod 15, so that oscillation of lift arm 8 cause vertical movement of plow assembly 1. IYith regard to a specific ratio of length between short link 14 and long links 12, the inventors tried the following which proved to produce the desired effect;
the length of short link 14, namely the distance between pivots Pl, P2 125 mms The length of each of long links 12, namely the distance between pivots P3 ! P4 ... 550 mms the distance between piyots, Pl, P3 353 mms the distance between piyots P2! P4 ... 342 m,~s Referring now to Fig. 2 ! links 12, 14 are arranged substantially parallel to each other when plow assembly 1 is in the middle of its ground engaying compass (plowing compass), and also output shaft 4 and input shaft 6 are arranged substantially parallel to each other in that state. In other words, within the ground engaging compass, plow assembly is movable substan-tially parallel to tractor frame 2 keeping output and input shafts 4, 6 substantially parallel to each other. This arrangement makes it possible to adjust the depth of plowing while output and input shafts 4, 6 are rotated at the same rate, in association with each other across universal joints 11, thus keeping down vibrations and noise.
In this way, lift arm 8 lifts lower long links'l2 and causes them to turn on pivots P3 on frame 2, which in turn raises plow assembly 1 and at the same time causes it to turn on pivots P4 by virtue of large-angle pivoting of short link 14 compared with long links 12. Thus the whole of plow assembly 1 is raised high in the direction of pivoting of long links 12.
As shown in Fig. 3, output shaft 4 and input shaft 6 are adapted to form substantially the same angle 6 with transmission shaft 9 when plow assembly 1 is in its highest position. In that position, plow assembly 1 continues to be actuated so that plowing can be resumed immediately after the tractor has been turned about. Also in that position, inter-locking mechanism 5 permits equal~rate rotation of shafts 4,6.
How plow assembly 1 is attached to tractor frame 2 will now be described. As seen from Figs. 5 and 6, a channel-shaped mounting member 16 is attached to the rear end of tractorframe 2, and bracket 13 is removably mounted on mounting member 16, bracket 13 pivotally supporting one end of short link 14 to allow the latter to oscillate on piyot Pl ~ ounting member 16 has four apertures 17, and bracket 13 also has ~our apertures 18~ apertures 17 and 18 having a larger diameter than a connecting pin 19 to receive connecting pins 19 therethrough. Numeral 20 indicates a hand lever having an - aperture 21 slightly larger in diameter than pin 19, and a wedge member 22 connected thereto by pivot P.
In assembling bracket 13 and mounting member 16, lever 20 is first placed in bracket 13, and the two are then 10 fitted into mounting member 16 placing apertures 17, 18 and 21 of the three elements in alignment, and finally connecting pin 19 is fitted to extend loosely therethrough. Next, lever 20 is turned in the direction indicated by the arrow to cause wedge member 22 to move into space between back wall 23 of mounting member 16 and a plate 24 on bracket 13, whereby bracket 13 is pushed toward plow 1 relative to mounting member 16 so as to prevent clattering of connecting pin 19 in apertures 17, 18.
Advantages of the above mounting arrangement will now be discussed in detail in comparison with the known arrangement.
20 Generally, in connecting bracket 13 and plow assembly 1 to the rear end of tractor frame 2 using connecting pin 19, apertures 17~ 18 are formed diametrically larger than pin 19 to easily receive the latter, and a wedge member is used to prevent clattering of pin 19 in aperture 17, 18. As shown in Fig. 8 according to the known art, a pair of wedge members 22' are arced toward each other with a spring 25 to interpose between back wall 23 of channel-shaped mounting member 16 and plate 24 of bracket 13. However, in such arrangement, two wedge members 22' have to be pulled apart against expansion spring 25 at the 30 time of fitting pin 19 in order to bring perforations 17, 18 substantially into alignment. If this is done manually, spring 25 must be resilient enough to manage with human power, which ~9~758 reduces, its effect of preyenting cla,ttering of pin 19 in per-forations 17, 18.
It may be conceived to use a gearing device to pull apart wedge members 22': for casy manual operation in spite of a big drawing force of the spring, but this will require complicated construction and operation.
According to the arrangement of this invention, hand lever 20 is provided pivotably on connecting pin 19, extending through channcl-shaped mounting member 16 and bracket 13 on frame 2, and association with this lever 20 a wedge member 22 is associated with the lever 20 by means of a pin to wedge between mounting member 16 and bracket 13. Connecting pin 19, which is a necessary constituent member, is'used to support wedge member 22, hence little chance of losing wedge member 22. Since pivotal movement of lever 20 about the axis of pin 19 causes wedge member 22 to wedge between mounting member 16 and bracket 13, a strong wedging can be obtained with a relatively weak actuating force using a lever of suitable length.
Accordingly, the use of a necessary constituent element, namely pin 19, for sustaining wedge member 22 is an advantage in that the construction is simple, there is little chance of losing wedge member 22, and that wedge member 22 can be driven in powerfully and yet easily.
Instead of pivotally mounting hand lever 20 direct on connecting pin 19, bracket 13 may carry a sleeve 26 secured there-to to receive pin 19, and lever 20 be mounted on the sleeve 26, as shown in Fig. 7. Such arrangement provides for even easier mounting of connecting pin 19 and renders a less chance of losing wedge mcmber 22.
However, with this arrangement, it is impossible to raise the plow assembly very high above the ground to bring it to an idle position with a parallel quadrilateral link mechanism.
This is inconvenient in turning the tractor to reverse the plowing directions near ridges or driving it over ridges.
Summary of the Invention This invention provides a tractor capable of raising the plow assembly to a considerable height when the latter is idle, while making most of the advantages in the associated action of the output and input shafts.
Accordingly, the present invention provides an assembly for attaching a rotary implement to a tractor, comprising two lower guide rods hinged at one end thereof to the tractor and hinged at the other end thereof to the rotary implement, said lower guide rods extending substantially horizontally in an operating position of the rotary implement, a first upper guide rod hinged at one end to the tractor, a second upper guide rod hinged at one end thereof to the other end of said first upper guide rod, said second upper guide rod being longer than said first upper guide rod and having the other end thereof coupled to said rotary implement, and a connecting rod pivotally connected at one end thereof to said second upper rod at an intermediate point near said one end of said second upper rod, said connecting rod being pivotally connected at the other end thereof to said rotary implement at a point which, in side view, is coincident with points at which the other ends of the lower guide rods are coupled to the tractor, whereby said rotary implement rotates upwardly relative to said lower guide rods as said guide rods are pivoted upwardly relative to the tractor.
~758 By so arranging that the upper and lower guide rods or links of the link mechanism are substantially parallel and the output and input shafts are substantially parallel when the plow assembly is near the ground engaging position, the plow assembly is allowed to move up and down within the operative compass without substantial alterations to such parallel states. That is to say, while in the operative compass, the plow assembly can move up and down without affecting the interlocking function of the universal joints of a transmission shaft providing drive power for the rotary implement. And, by making the upper link shorter than the lower links, with this interlocking function at full play, the plow assembly can be raised to a very high inoperative position for the extent of link oscillation. Thus, during plowing work, the , -4-,~, ., , 37s8 input shaft is driven at the same rate as the output shart to produce very little vibrations and noise, and yet, to the great advantaye of the tractor, the plow assembly can be raised high at the time of reversing the tractor or driving it over ridges.
It is an object of this invention to provide a tractor capable of effecting smooth power transmission to the plow assembly and of raising the plow assembly high above the ground at the time of reversing and the like.
Another object of this invention is to provide a tractor enabling the plow assembly to be mounted at the rear end thereof in a reliable manner with a simple arrangement.
Other objects and advantages will be apparent from the following description.
Brief Description of the Drawings.
In the drawings illustrating tractors according to this invention;
Fig. 1 is a side view of the rear portion of a tractor;
Figs. 2 and 3 are views illustrating a plow assembly at lowered and raised positions, respectively;
Fig. 4 is a view corresponding to Fig. 3 and illustrating the conventional plow assembly at a raised position;
Fig. 5 is a part view in vertical section showing the portion of the tractor mounting the plow assembly;
Fig. 6 is a partly broken away perspective view showing the same portion as in Fig. 5;
Fig. 7 is a rear view in cross section showing another embodiment of the invention; and Fig. 8 is a side view in vertical section showing the known plow asse~bly mounting portion.
Descri~tion of the ~referred Embodiments The mode of practising the invention is hereinafter describcd with reference to preferred embodiments. In Fig. 1, a rotary plow assembly 1 is shown attached to the rear end of a tractor frame 2. The attaching arrangement includes an operative connection between an output shaft 4 protruding from a trans-mission case 3 and an input shaft 6 of plow assembly 1 through an interlocking mechanism 5 as well as a link mechanism 7 and a lift arm 3 for a vertical movement of plow assembly 1.
Interlocking mechanism 5 consists of an axially collapsible transmission shaft 9, a tubular cover 10, and uni-versal joints 11 supported by the ends of tubular cover 10 and connected to the ends of transmission shaft 9. Universal joints 11 are also connected to output shaft 4 and input shaft 6 res-pectively, whereby rotation of output shaft 4 on tractor frame 2 is transferred to input shaft 6 of plow assembly 1 by way of transmission shaft 9.
Link mechanism 7 consists of two lower long links or guide rods 12 pivotally connected to a lower portion of case 3 and a middle portion of plow assembly 1, and an upper short link or guide rod 14 pivotally connected to the rear end of a brasket 13 secured to frame 2 and to a longer upper guide rod 114 which is coupled to the upper end of plow assembly 1. ~hen tractor frame 2 is viewed from its side, lower long links 12 is critically longer than upper short link 14 from pivot to pivot. A free end of lift arm 3 is pivotally connected to long link 12 intermediate the ends thereof by means of a rod 15, so that oscillation of lift arm 8 cause vertical movement of plow assembly 1. IYith regard to a specific ratio of length between short link 14 and long links 12, the inventors tried the following which proved to produce the desired effect;
the length of short link 14, namely the distance between pivots Pl, P2 125 mms The length of each of long links 12, namely the distance between pivots P3 ! P4 ... 550 mms the distance between piyots, Pl, P3 353 mms the distance between piyots P2! P4 ... 342 m,~s Referring now to Fig. 2 ! links 12, 14 are arranged substantially parallel to each other when plow assembly 1 is in the middle of its ground engaying compass (plowing compass), and also output shaft 4 and input shaft 6 are arranged substantially parallel to each other in that state. In other words, within the ground engaging compass, plow assembly is movable substan-tially parallel to tractor frame 2 keeping output and input shafts 4, 6 substantially parallel to each other. This arrangement makes it possible to adjust the depth of plowing while output and input shafts 4, 6 are rotated at the same rate, in association with each other across universal joints 11, thus keeping down vibrations and noise.
In this way, lift arm 8 lifts lower long links'l2 and causes them to turn on pivots P3 on frame 2, which in turn raises plow assembly 1 and at the same time causes it to turn on pivots P4 by virtue of large-angle pivoting of short link 14 compared with long links 12. Thus the whole of plow assembly 1 is raised high in the direction of pivoting of long links 12.
As shown in Fig. 3, output shaft 4 and input shaft 6 are adapted to form substantially the same angle 6 with transmission shaft 9 when plow assembly 1 is in its highest position. In that position, plow assembly 1 continues to be actuated so that plowing can be resumed immediately after the tractor has been turned about. Also in that position, inter-locking mechanism 5 permits equal~rate rotation of shafts 4,6.
How plow assembly 1 is attached to tractor frame 2 will now be described. As seen from Figs. 5 and 6, a channel-shaped mounting member 16 is attached to the rear end of tractorframe 2, and bracket 13 is removably mounted on mounting member 16, bracket 13 pivotally supporting one end of short link 14 to allow the latter to oscillate on piyot Pl ~ ounting member 16 has four apertures 17, and bracket 13 also has ~our apertures 18~ apertures 17 and 18 having a larger diameter than a connecting pin 19 to receive connecting pins 19 therethrough. Numeral 20 indicates a hand lever having an - aperture 21 slightly larger in diameter than pin 19, and a wedge member 22 connected thereto by pivot P.
In assembling bracket 13 and mounting member 16, lever 20 is first placed in bracket 13, and the two are then 10 fitted into mounting member 16 placing apertures 17, 18 and 21 of the three elements in alignment, and finally connecting pin 19 is fitted to extend loosely therethrough. Next, lever 20 is turned in the direction indicated by the arrow to cause wedge member 22 to move into space between back wall 23 of mounting member 16 and a plate 24 on bracket 13, whereby bracket 13 is pushed toward plow 1 relative to mounting member 16 so as to prevent clattering of connecting pin 19 in apertures 17, 18.
Advantages of the above mounting arrangement will now be discussed in detail in comparison with the known arrangement.
20 Generally, in connecting bracket 13 and plow assembly 1 to the rear end of tractor frame 2 using connecting pin 19, apertures 17~ 18 are formed diametrically larger than pin 19 to easily receive the latter, and a wedge member is used to prevent clattering of pin 19 in aperture 17, 18. As shown in Fig. 8 according to the known art, a pair of wedge members 22' are arced toward each other with a spring 25 to interpose between back wall 23 of channel-shaped mounting member 16 and plate 24 of bracket 13. However, in such arrangement, two wedge members 22' have to be pulled apart against expansion spring 25 at the 30 time of fitting pin 19 in order to bring perforations 17, 18 substantially into alignment. If this is done manually, spring 25 must be resilient enough to manage with human power, which ~9~758 reduces, its effect of preyenting cla,ttering of pin 19 in per-forations 17, 18.
It may be conceived to use a gearing device to pull apart wedge members 22': for casy manual operation in spite of a big drawing force of the spring, but this will require complicated construction and operation.
According to the arrangement of this invention, hand lever 20 is provided pivotably on connecting pin 19, extending through channcl-shaped mounting member 16 and bracket 13 on frame 2, and association with this lever 20 a wedge member 22 is associated with the lever 20 by means of a pin to wedge between mounting member 16 and bracket 13. Connecting pin 19, which is a necessary constituent member, is'used to support wedge member 22, hence little chance of losing wedge member 22. Since pivotal movement of lever 20 about the axis of pin 19 causes wedge member 22 to wedge between mounting member 16 and bracket 13, a strong wedging can be obtained with a relatively weak actuating force using a lever of suitable length.
Accordingly, the use of a necessary constituent element, namely pin 19, for sustaining wedge member 22 is an advantage in that the construction is simple, there is little chance of losing wedge member 22, and that wedge member 22 can be driven in powerfully and yet easily.
Instead of pivotally mounting hand lever 20 direct on connecting pin 19, bracket 13 may carry a sleeve 26 secured there-to to receive pin 19, and lever 20 be mounted on the sleeve 26, as shown in Fig. 7. Such arrangement provides for even easier mounting of connecting pin 19 and renders a less chance of losing wedge mcmber 22.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An assembly for attaching a rotary implement to a tractor, comprising two lower guide rods hinged at one end thereof to the tractor and hinged at the other end thereof to the rotary implement, said lower guide rods extending substan-tially horizontally in an operating position of the rotary implement, a first upper guide rod hinged at one end to the tractor, a second upper guide rod hinged at one end thereof to the other end of said first upper guide rod, said second upper guide rod being longer than said first upper guide rod and having the other end thereof coupled to said rotary implement, and a connecting rod pivotally connected at one end thereof to said second upper rod at an intermediate point near said one end of said second upper rod, said connecting rod being pivotally connected at the other end thereof to said rotary implement at a point which, in side view, is coincident with points at which the other ends of the lower guide rods are coupled to the tractor, whereby said rotary implement rotates upwardly relative to said lower guide rods as said guide rods are pivoted upwardly relative to the tractor.
2. An assembly according to claim 1, wherein said first upper guide rod is hinged at said one end thereof to said tractor by means of a bracket having a rearwardly extending arm which is longer than said first upper guide rod.
3. An assembly according to claim 1, further comprising a transmission shaft coupled respectively to an output shaft on the tractor and an input shaft on the rotary implement by universal joints, said input and output shaft remaining substantially parallel when said rotary implement is in the operating position.
4. An assembly according to claim 1, further comprising a channel-shaped mounting member secured to the rear end of the tractor, a bracket removably mounted on the mounting member to pivotally engage said one end of said first upper guide rod, a pin adapted to extend through apertures provided in the mounting member and the bracket and being slightly smaller in diameter than said apertures, a hand lever pivotable on said pin, and a wedge member operatively connected to the hand lever and adapted to advance between a back wall of the mounting member and a plate provided on the bracket with pivotal movement of the hand lever to thereby fix the bracket securely to the mounting member.
5. An assembly according to claim 4, further comprising a sleeve secured to the bracket to receive the connecting rod therethrough and to carry the hand lever pivotably fitted thereon.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1370176A JPS5298102A (en) | 1976-02-10 | 1976-02-10 | Tractor |
| JP13701/1976 | 1976-02-10 | ||
| JP21393/1976 | 1976-02-24 | ||
| JP2139376U JPS5519441Y2 (en) | 1976-02-24 | 1976-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1098758A true CA1098758A (en) | 1981-04-07 |
Family
ID=26349531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA267,216A Expired CA1098758A (en) | 1976-02-10 | 1976-12-06 | Tractor |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1098758A (en) |
| DE (1) | DE2658244C3 (en) |
| FR (1) | FR2340674A1 (en) |
| GB (1) | GB1562695A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3010885C2 (en) * | 1980-03-21 | 1982-05-13 | Jean Walterscheid Gmbh, 5204 Lohmar | Three-point hitch |
| US4386661A (en) * | 1981-09-08 | 1983-06-07 | Hesston Corporation | Rear mounted rotary tiller |
| SE456389C (en) * | 1987-02-13 | 1989-09-13 | Oeverums Bruk Ab | AGRICULTURAL EQUIPMENTS LIKE COMMERCIAL DISTRIBUTOR, AGRICULTURAL SPRAY OR LIKELY |
-
1976
- 1976-11-19 GB GB4833776A patent/GB1562695A/en not_active Expired
- 1976-12-06 CA CA267,216A patent/CA1098758A/en not_active Expired
- 1976-12-09 FR FR7637159A patent/FR2340674A1/en active Granted
- 1976-12-22 DE DE19762658244 patent/DE2658244C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2340674A1 (en) | 1977-09-09 |
| DE2658244A1 (en) | 1977-08-11 |
| GB1562695A (en) | 1980-03-12 |
| DE2658244C3 (en) | 1980-03-20 |
| DE2658244B2 (en) | 1979-07-26 |
| FR2340674B1 (en) | 1980-04-30 |
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