CA2070928A1 - Brake mechanism for a forest cultivator - Google Patents
Brake mechanism for a forest cultivatorInfo
- Publication number
- CA2070928A1 CA2070928A1 CA002070928A CA2070928A CA2070928A1 CA 2070928 A1 CA2070928 A1 CA 2070928A1 CA 002070928 A CA002070928 A CA 002070928A CA 2070928 A CA2070928 A CA 2070928A CA 2070928 A1 CA2070928 A1 CA 2070928A1
- Authority
- CA
- Canada
- Prior art keywords
- disc wheel
- disc
- brake mechanism
- clamped
- wheel
- 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.)
- Abandoned
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
- A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
- A01B35/16—Other machines for working soil not specially adapted for working soil on which crops are growing with rotating or circulating non-propelled tools
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Braking Arrangements (AREA)
- Handcart (AREA)
Abstract
Abstract The invention relates to a brake mechanism for a forest cultivator, said forest cultivator comprising disc wheels (1, 1'), mounted on either side of a body (3) and fitted with cultivating tools (2), and said brake mechanism comprising at least one contact element (7) fastened to each disc wheel (1, 1'), a release element (6) fastened to a body (11) as well as a clamping element (8) for preventing rotation of disc wheel (1, 1'), said release element (6) being adapted through the action of contact element (7) to push towards a clamped disc wheel (1') and to effect the clamping of a rotating disc wheel (1) and the release of a clamped disc wheel (1'). The release element comprises a control rod (6) common to both disc wheels (1, 1') and the clamping element comprises a locking rod (8) common to both disc wheels (1, 1'), said movement of control rod (6) being adapted to be transmitted into a movement in the direction oppo-site to that of locking rod (8) for releasing a clamped disc wheel (1').
Fig. 2
Fig. 2
Description
9~8 Brake mechan-ism for a forest cultivator The present invention relates to a brake mechanism for a forest cultivator, said forest cultivator cornprising disc wheels mounted on either side of a body and fitted with cultivating tools and said brake mechanis~ com-prising at least one contact element fastened to each disc wheel, a release element fastened to the body as well as a clamping element for preventing rotation of the disc wheel, said release element being adapted through the action of the contact element to push to-wards a clamped disc wheel and to effect the clamping of a rotating disc wheel and the release of a clamped disc wheel.
A forest cultivator is used in planting of forests.
A cultivator dragged behind a tractor works the ground at suitable intervals to form a planting spot, i.e. an area free of vegetation and peat for sowing a tree seed.
A spot is created as the disc wheel of a cultivating device rotates and the tools carried on the disc wheel press against the ground. At this point, a brake de-vice stops rotation of the disc wheel, whereby the tools pressed in the ground remove the peat layer for exposing mineral soil.
The Finnish Patent application 1728/64 discloses a brake mechanism for a forest cultivator, wherein the disc wheels are fitted with bevel-topped contact elements, which upon rotation of the wheel apply a force to two successive release elements. The first of these re-lease elements releases a wheel that was under braking and the second one clamps or locks a wheel that was in motion for producing an alternating motion for the wheels. The wheel-clamping elements comprise hydraulic
A forest cultivator is used in planting of forests.
A cultivator dragged behind a tractor works the ground at suitable intervals to form a planting spot, i.e. an area free of vegetation and peat for sowing a tree seed.
A spot is created as the disc wheel of a cultivating device rotates and the tools carried on the disc wheel press against the ground. At this point, a brake de-vice stops rotation of the disc wheel, whereby the tools pressed in the ground remove the peat layer for exposing mineral soil.
The Finnish Patent application 1728/64 discloses a brake mechanism for a forest cultivator, wherein the disc wheels are fitted with bevel-topped contact elements, which upon rotation of the wheel apply a force to two successive release elements. The first of these re-lease elements releases a wheel that was under braking and the second one clamps or locks a wheel that was in motion for producing an alternating motion for the wheels. The wheel-clamping elements comprise hydraulic
2~
brake drums.
The Finnish Patent application 2461/64 also discloses a forest cultivator equipped with a similar brake mech-anism. This brake mechanism is also provided with contact elements for releasing a flow of hydraulic fluid on one or the other side of a hydraulic piston arrangementO The action of hydraulic pressure dis-places the piston and a piston-mounted clamping ele-ment shifts to a position for preventing rotation of one cultivating rod and for releasing a clamped cul-tivating rod, respectively.
Both of the above-cited prior art brake devices are provided with a hydraulic system, which is susceptible to damage and whose operating reliability is not the best possible under heavy loading.
An object of the invention is to provide a brake mech-anism, which is simple in design but at the same time highly reliable in operation. A brake mechanism of the invention is primarily characterized in that ~he release element comprises a control rod common to both disc wheels and the clamping element comprises a lock-ing rod common to both disc wheels, said movement of the control rod being adapted to be transmitted into a movementin the direction opposite to that of the locking rod for releasing a clamped disc wheel.
A brake mechanism of the invention essentially includes two rod-shaped elements, one serving as a release ele-ment and the other as a clamping element. Thus, the brake mechanism is completely mechanical, simple in design, and hence reliable in operation.
brake drums.
The Finnish Patent application 2461/64 also discloses a forest cultivator equipped with a similar brake mech-anism. This brake mechanism is also provided with contact elements for releasing a flow of hydraulic fluid on one or the other side of a hydraulic piston arrangementO The action of hydraulic pressure dis-places the piston and a piston-mounted clamping ele-ment shifts to a position for preventing rotation of one cultivating rod and for releasing a clamped cul-tivating rod, respectively.
Both of the above-cited prior art brake devices are provided with a hydraulic system, which is susceptible to damage and whose operating reliability is not the best possible under heavy loading.
An object of the invention is to provide a brake mech-anism, which is simple in design but at the same time highly reliable in operation. A brake mechanism of the invention is primarily characterized in that ~he release element comprises a control rod common to both disc wheels and the clamping element comprises a lock-ing rod common to both disc wheels, said movement of the control rod being adapted to be transmitted into a movementin the direction opposite to that of the locking rod for releasing a clamped disc wheel.
A brake mechanism of the invention essentially includes two rod-shaped elements, one serving as a release ele-ment and the other as a clamping element. Thus, the brake mechanism is completely mechanical, simple in design, and hence reliable in operation.
3 ;2~ 8 The invention will now be described in more detail with reference made to the accompanying drawings, in which fig. 1 shows a forest cultivator provided with a brake mechanism of the invention, fig. 2 is a plan view of the brake apparaLus shown in fig. 1, fig. 3 shows the components of another brake mechanism of the invention mounted on a disc wheel.
Referring to fig. 1, the forest cultivator includes two disc wheels 1 and 1', with cultivating tools 2 extend-ing radially from the outer periphery thereof. In this exemplary case, there are three tools side by side.
The number of tools may just as well be one or more than three side by side. The disc wheels 1 and 1' are journalled to a forest cultivator body 3. A tractor is used to drag the forest cultivator by means of a boom 10 and, upon cultivating or spotting, said disc wheels 1 and 1' are alternately braked by means of a locking rod 8 and a locking shoulder 9, said cultivating tools 2 working a spot by using alternately the right-hand side and the left-hand side disc wheel 1 and 1', respectively.
As shown in fi~. 2, the disc wheel 1' is clamped by means of a locking rod 8. The locking rod 8 and a control rod 6 are fastened to body 3 and adapted to shift transversely back and forth relative thereto.
The locking shoulders 9 extending from the side of disc wheel 1' facing said body 3, i.e. from internal side, are located in alignment with locking rod 8. As
Referring to fig. 1, the forest cultivator includes two disc wheels 1 and 1', with cultivating tools 2 extend-ing radially from the outer periphery thereof. In this exemplary case, there are three tools side by side.
The number of tools may just as well be one or more than three side by side. The disc wheels 1 and 1' are journalled to a forest cultivator body 3. A tractor is used to drag the forest cultivator by means of a boom 10 and, upon cultivating or spotting, said disc wheels 1 and 1' are alternately braked by means of a locking rod 8 and a locking shoulder 9, said cultivating tools 2 working a spot by using alternately the right-hand side and the left-hand side disc wheel 1 and 1', respectively.
As shown in fi~. 2, the disc wheel 1' is clamped by means of a locking rod 8. The locking rod 8 and a control rod 6 are fastened to body 3 and adapted to shift transversely back and forth relative thereto.
The locking shoulders 9 extending from the side of disc wheel 1' facing said body 3, i.e. from internal side, are located in alignment with locking rod 8. As
4 2~ 9,~;~8 disc wheel 1' is rotating, said locking shoulder 9 is carried along with the disc wheel and comes to contact with locking rod 8. This prevents the rotation of disc wheel 1' and a braking cycle commences. At the same time, said cultivating tools 2 lie against the ground and produce a cultivating spot. The braking cycle comes to an end as a contact element 7 included in ro-tating disc wheel 1 on the opposite side urges said control rod 6 serving as a release element over to the side of clamped disc wheel 1'. ThuS, a transmission lever 5 shifts said locking rod 8 over to the side of opposite disc wheel 1 so as to release the clamped disc wheel 1' to allow its rotation. The contact elements 7 and locking shoulders 9 included in disc wheel 1, 1' are located so as to commence and conclude at a proper moment.
Thus, according to figs. 1 and 2, the brake mechanism includes at least one contact element 7, which is fast-ened to each disc wheel 1 and 1' and typically com-prises a bevel~faced member attached to the internal side of disc wheel 1 and 1' and located in alignment with control rod 6. As disc wheel 1, 1' is rotating, said contact element 7 controls a release element, which is included in the brake apparatus and comprises a control rod 6 common to both wheels, pushing the con-trol rod over to the side of clamped disc wheel 1'.
The movement of control rod 6 is adapted to be trans-mitted to a clamping element, the latter comprising a locking rod 8 common to both disc wheels 1 and 1'.
Said movement is transmitted through the action of a transmission lever 5 pivotably journalled to forest cultivator body 3. The transmission lever 5 can be Eor example a rod, which is centrally pivoted to the body and whose ends are fastened on the one hand to 2~
control rod 6 and on the other hand to a link mounted on locking rod 8 or between two pins, as shown in fig.
2. Thus, the transmission lever 5 carries said locking rod 8 over to the side of opposite, rotating disc wheel 1 so as to release said disc wheel 1', which has just been in a clamped position.
The disc wheel 1 and 1' is fitted with extending lock-ing shoulders 9, adapted to come in contact with lock-ing rod 8 for locking or clamping said disc wheel 1.
When the next locking shoulder 9 of rotating disc wheel 1 comes in alignment with locking rod 8, those two are forced in contact and said rotating disc wheel 1 is clamped. The locking of disc wheel 1 having a culti-vating shift occurs simultaneously as the cultivating tool 2 is in a lower position and pressed against the ground. This produces cultivating spots in turn on alternating sides. In fig. 2, the brake apparatus is depicted at a moment when the disc wheel 1 will be clamped in just a while and disc wheel 1' is about to be released.
Fig. 3 illustrates another design of a disc wheel 1.
This disc wheel 1 is only provided with two cultivating tools 2 on the opposite sides of disc wheel 1. Another difference between this disc wheel and those of figs.
1 and 2 is that a locking shoulder 9 is located closer to the centre of disc wheel 1 than a contact element 7.
Thus, the locking rod and the control rod are also located in reverse order as compared to figs. 1 and 2.
The end of cultivating tool 2 is on the same level as the periphery of disc wheel 1. This offers the ad-vantage that the cultivating device is not laterally tiltable as it is not necessary to lift the disc wheel 1 on top of the cultivating tools 2 prior to a braking 2~7~ 8 cycle. This design is accomplished by removing from disc wheel 1 a segmental section and by fitting in the middle thereof said tools 2 extending up to the peri-phery.
In the disc wheel of fig. 3, said locking shoulder 9 is provided with a rubber pad for a smooth locking or clamping. In addition, said locking shoulder 9 is extended as a back-up bracket 9', which is preferably of equal height and width and arch-shaped. This arch-shaped back-up bracket 9' makes sure that said locking rod 8 is retained in a clamped position in front of the locking shoulder of the other disc wheel. Once the locking rod 8 moves out of a clamping position, i.e. the end of locking rod 8 rises above the locking shoulder 9, said back-up bracket 9' prevents the random backward slipping of locking rod 8. Otherwise this would result in a premature release of the opposite, clamped disc wheel.
The disc wheel 1 can also be provided with a chain 4, as shown for example in figs. 1 and 2, said chain 4 raking soil during a braking cycle for covering the seeds and, for example, fertilizers.
The invention is not limited to the above embodiment but it can be modified within the scope of the annexed claims. Thus, for example a transmission lever 5 can be replaced with a body-mounted gear having its top and bottom in contact on the one hand with locking rod 8 and on the other hand with control rod 6.
2~39.'~3 The disc wheels 1 and 1' contain usual seed compartments which comprise sowing openings after the tools for sowing the seeds into the ground to the spotS worked by the tools. These means are well-known to a man skilled in the art and they are therefore not described in more detail.
Thus, according to figs. 1 and 2, the brake mechanism includes at least one contact element 7, which is fast-ened to each disc wheel 1 and 1' and typically com-prises a bevel~faced member attached to the internal side of disc wheel 1 and 1' and located in alignment with control rod 6. As disc wheel 1, 1' is rotating, said contact element 7 controls a release element, which is included in the brake apparatus and comprises a control rod 6 common to both wheels, pushing the con-trol rod over to the side of clamped disc wheel 1'.
The movement of control rod 6 is adapted to be trans-mitted to a clamping element, the latter comprising a locking rod 8 common to both disc wheels 1 and 1'.
Said movement is transmitted through the action of a transmission lever 5 pivotably journalled to forest cultivator body 3. The transmission lever 5 can be Eor example a rod, which is centrally pivoted to the body and whose ends are fastened on the one hand to 2~
control rod 6 and on the other hand to a link mounted on locking rod 8 or between two pins, as shown in fig.
2. Thus, the transmission lever 5 carries said locking rod 8 over to the side of opposite, rotating disc wheel 1 so as to release said disc wheel 1', which has just been in a clamped position.
The disc wheel 1 and 1' is fitted with extending lock-ing shoulders 9, adapted to come in contact with lock-ing rod 8 for locking or clamping said disc wheel 1.
When the next locking shoulder 9 of rotating disc wheel 1 comes in alignment with locking rod 8, those two are forced in contact and said rotating disc wheel 1 is clamped. The locking of disc wheel 1 having a culti-vating shift occurs simultaneously as the cultivating tool 2 is in a lower position and pressed against the ground. This produces cultivating spots in turn on alternating sides. In fig. 2, the brake apparatus is depicted at a moment when the disc wheel 1 will be clamped in just a while and disc wheel 1' is about to be released.
Fig. 3 illustrates another design of a disc wheel 1.
This disc wheel 1 is only provided with two cultivating tools 2 on the opposite sides of disc wheel 1. Another difference between this disc wheel and those of figs.
1 and 2 is that a locking shoulder 9 is located closer to the centre of disc wheel 1 than a contact element 7.
Thus, the locking rod and the control rod are also located in reverse order as compared to figs. 1 and 2.
The end of cultivating tool 2 is on the same level as the periphery of disc wheel 1. This offers the ad-vantage that the cultivating device is not laterally tiltable as it is not necessary to lift the disc wheel 1 on top of the cultivating tools 2 prior to a braking 2~7~ 8 cycle. This design is accomplished by removing from disc wheel 1 a segmental section and by fitting in the middle thereof said tools 2 extending up to the peri-phery.
In the disc wheel of fig. 3, said locking shoulder 9 is provided with a rubber pad for a smooth locking or clamping. In addition, said locking shoulder 9 is extended as a back-up bracket 9', which is preferably of equal height and width and arch-shaped. This arch-shaped back-up bracket 9' makes sure that said locking rod 8 is retained in a clamped position in front of the locking shoulder of the other disc wheel. Once the locking rod 8 moves out of a clamping position, i.e. the end of locking rod 8 rises above the locking shoulder 9, said back-up bracket 9' prevents the random backward slipping of locking rod 8. Otherwise this would result in a premature release of the opposite, clamped disc wheel.
The disc wheel 1 can also be provided with a chain 4, as shown for example in figs. 1 and 2, said chain 4 raking soil during a braking cycle for covering the seeds and, for example, fertilizers.
The invention is not limited to the above embodiment but it can be modified within the scope of the annexed claims. Thus, for example a transmission lever 5 can be replaced with a body-mounted gear having its top and bottom in contact on the one hand with locking rod 8 and on the other hand with control rod 6.
2~39.'~3 The disc wheels 1 and 1' contain usual seed compartments which comprise sowing openings after the tools for sowing the seeds into the ground to the spotS worked by the tools. These means are well-known to a man skilled in the art and they are therefore not described in more detail.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A brake mechanism for a forest cultivator, said forest cultivator comprising disc wheels (1, 1') mount-ed on either side of a body (3) and fitted with culti-vating tools (2) and said brake mechanism comprising at least one contact element (7) fastened to each disc wheel (1, 1'), a release element (6) fastened to a body (11) as well as a clamping element (8) for pre-venting rotation of disc wheel (1, 1'), said release element (6) being adapted through the action of contact element (7) to push towards a clamped disc wheel (1') and to effect the clamping of a rotating disc wheel (1) and the release of a clamped disc wheel (1'), c h a r a c t e r i z e d in that the release element comprises a control rod (6) common to both disc wheels (1, 1') and the clamping element comprises a locking rod (8) common to both disc wheels (1, 1'), said movement of control rod (6) being adapted to be transmitted into a movement in the direction opposite to that of locking rod (8) for releasing a clamped disc wheel (1').
2. A brake mechanism as set forth in claim 1, c h a r -a c t e r i z e d in that said movement is adapted to be transmitted through the action of a transmission lever (5) journalled pivotably to body (3).
3. A brake mechanism as set forth in claim 1, c h a r -a c t e r i z e d in that in the clamped position of disc wheel (1') said locking rod (8) is in contact with a locking shoulder (9) fastened to disc wheel (1') and extending therefrom.
4. A brake mechanism as set forth in claim 3, c h a r -a c t e r i z e d in that said disc wheel (1, 1') in-cludes, as an extension of locking shoulder (9), a back-up bracket (9') fastened to disc wheel (1, 1') and extending therefrom for preventing the clamping movement of locking rod (8).
5. A brake mechanism as set forth in claim 4, c h a r a c t e r i z e d in that said back-up bracket (9') is arch-shaped and substantially of the same height as locking shoulder (9).
6. A brake mechanism as set forth in claim 3, c h a r a c t e r i z e d in that said locking shoulder (9) is provided with a rubber pad or a like shock-absorbing element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9201752A SE469363B (en) | 1992-06-09 | 1992-06-09 | Brake mechanism for a forest cultivator |
| CA002070928A CA2070928A1 (en) | 1992-06-09 | 1992-06-10 | Brake mechanism for a forest cultivator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9201752A SE469363B (en) | 1992-06-09 | 1992-06-09 | Brake mechanism for a forest cultivator |
| CA002070928A CA2070928A1 (en) | 1992-06-09 | 1992-06-10 | Brake mechanism for a forest cultivator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2070928A1 true CA2070928A1 (en) | 1993-12-11 |
Family
ID=25675201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002070928A Abandoned CA2070928A1 (en) | 1992-06-09 | 1992-06-10 | Brake mechanism for a forest cultivator |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2070928A1 (en) |
| SE (1) | SE469363B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI971348A (en) * | 1996-05-09 | 1997-11-10 | Tapani Einari Varis | Device for forest land tillage |
-
1992
- 1992-06-09 SE SE9201752A patent/SE469363B/en not_active IP Right Cessation
- 1992-06-10 CA CA002070928A patent/CA2070928A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| SE9201752L (en) | 1993-06-28 |
| SE469363B (en) | 1993-06-28 |
| SE9201752D0 (en) | 1992-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |