CA1069491A - Winch arrangement - Google Patents
Winch arrangementInfo
- Publication number
- CA1069491A CA1069491A CA288,498A CA288498A CA1069491A CA 1069491 A CA1069491 A CA 1069491A CA 288498 A CA288498 A CA 288498A CA 1069491 A CA1069491 A CA 1069491A
- Authority
- CA
- Canada
- Prior art keywords
- winch
- frame
- shaft
- band
- drum
- 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
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims abstract description 5
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000543 intermediate Substances 0.000 claims 2
- 239000004677 Nylon Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
Landscapes
- Catching Or Destruction (AREA)
Abstract
CANADIAN PATENT APPLICATION
OF
BENGT ARVID JOHANSSON
AND
BO AKE LENNART BLIXT
FOR
WINCH ARRANGEMENT
Abstract of the Disclosure Winch arrangement primarily intended for withdrawal of hung trees or other objects, comprising a holding unit for fixing the winch to a stationary object, and a winch unit connected to a frame. The holding unit includes an elongated fastening means which at one end is secured to the frame, while its intermediate portion is drawn around the stationary object and its other end is connected to the frame via a tightening mechanism. The winch unit comprises a drum rotatably mounted on a shaft in the frame for unwinding and winding a flat band which at its free end has a fastener for connection to the tree, a control mechanism for the operation of the drum, and an engageable and disengageable ratchet mechanism for selectively preventing unwinding of the band.
OF
BENGT ARVID JOHANSSON
AND
BO AKE LENNART BLIXT
FOR
WINCH ARRANGEMENT
Abstract of the Disclosure Winch arrangement primarily intended for withdrawal of hung trees or other objects, comprising a holding unit for fixing the winch to a stationary object, and a winch unit connected to a frame. The holding unit includes an elongated fastening means which at one end is secured to the frame, while its intermediate portion is drawn around the stationary object and its other end is connected to the frame via a tightening mechanism. The winch unit comprises a drum rotatably mounted on a shaft in the frame for unwinding and winding a flat band which at its free end has a fastener for connection to the tree, a control mechanism for the operation of the drum, and an engageable and disengageable ratchet mechanism for selectively preventing unwinding of the band.
Description
~ 3~
The present invention relates to a winch arrangement primarily intended for withdrawal of hung trees or other objects, in which the winch comprises a holding unit for fixing the winch to a stationary object, and a winch unit connected to a frame.
In conventional winches for withdrawal of hung trees, the hauling means used are chains or ropes of heavy and bulky construction, and the winches will therefore be difficult to handle and will require a considera~le amount of tractive power for their operation. In case the tree is tightly stuck, the direct power transmission to the l~drum, on which the hauling means is to be ~ound, is often found insufficient and some form of increase gear is required to obtain a higher gear ratio to disengage the tree from its locked position.
As logging mostly takes place on rough ground the winch should preferably be easily portable and easily operable.
The object of the invention is to provide a winch arrangement which eliminates the problems outlined above and is of simple and ine~pensive construction and easily mounted.
This object is achieved by the winch arrangement of this inven-tion, wherein the holding unit includes an elongated fastening means ~dwhich has one end secured to the frame, ~hile its intermediate portion is drawn around the stationary object and its other end is connected to the frame via a tightening mechanism, and wherein the winch unit comprises: a drum rotatably mounted on a shaft in the frame for unwinding and winding a flat band which at its free end has a fastener for connection to the tree; a control mechanism for the operation of the drum; and an engageable and disengageable ratchet mechanism for selectively preventing unwinding of the band.
The invention will be described in greater detail hereinafter with reference to the accompanying drawings, which illustrate a preferred en~bodiment and in which:-Fig 1 is a first side view of a winch according to the invention,showing a half of a winch casing and part of the holding unit in-cluded in the winch;
Fig 2 is a second side view of the winch, showing the other half of the winch casing and the remaining part of the holding unit;
Fig 3 is a side view of the winch, in which said other half of the casing is removed, thus uncovering the winch unit included in the winch;
Fig 4 shows part of the view of Fig 3, with the winch unit in ~D a different position of function;
PR/bud 2 .
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. . .` . ' Fig 5 .is a side view of the part of the holdin~ means shown in Fig 2; and Fig 6 is an end view taken on line VI-VI in Fig 3, showing the winch unit in greater detail, the winch casing being represented by dash-dotted lines.
Figs 1, 2 and 3 show a winch arrangement primarily intended for withdrawal of hung trees. This arrangement comprises two main parts, viz. a holding means 1 for fixing the winch to a stationary object, and a winch unit 2, said units being connected to a frame 1 3. In this case the frame comprises two protectiny halves 4, ~ of a casing, which are reinforced by means of strengthening ~r~u~s 6.
The halves 4, 5 of the casing are provided with apertured lugs 7 adapted to receive fixing bolts 8 for securing the halves of the casing to each other. Another bolt 8A is provided for the same purpose.
As shown in Figs 1, 2 and 5 the holding unit ] comprises a tightening mechanism 9 mounted on the half 5 of the casing, a support 10 mounted on the half 4 of the casing, and an elongated ~astening means 11, preferably consisting of a flat band of nylon ~represented by dash-dotted lines in Fig 1. Said fastening means has one end pivotally connected to the support 10, while its intermediate portion is drawn around the stationarv object, e.g.
the trunk of a standing tree, and its other end is connected to the half 5 of the casing via the tightening mechanism 9. The ; tightening mechanism 9 includes a frame $tructurecomprising two plates 12, 13 which are spaced from each other and connected each ; to one of the strengthening ~ 6 of the half 5 of the casing.
Rotatably mounted between the plates 12, 13 is a shaft 14 comprising two parallel pins 15, 1~ positioned between the plates and spaced ~from each other so that a slot 17 is formed therebetween for receiving the free end of the band 11. A suitable tool is used to rotate the bolt head 18 of the shaft 14 whereby the band 11 is wound on the shaft 14 and is tightened so that the winch will be fixed to the stationary object. A blocking means lg is arranged - on the tightening mechanism 9 to prevent unwinding of the fastening means. The blocking means acts upon both ends of the shaft to load this uniformly. The blocking means comprises: two tooth wheels 20, 21 positioned each on one of the ends of the shaft 14;
a locking plate 22 which engages the two tooth wheels simultaneously and is slidably received in grooves in the plates 12, 13 of the '' ,~
,: ' ' . ~ . . : .
` :: . - ~
' . .
frame strUCtUre; and two sprin~s 23 which bias the locking plate 22 towards a locked position. sy "locked position" is to be under-stood the position in which the band is locked against unwinding.
The locking plate 22 comprises a generally rectangular disk having two projections 24, 25 arranged in the front part of the locking plate and running in said grooves in the plates 12 and 13, said projections engaging each one of the tooth wheels 20 and 21, respectively. The projections define between themselves a recess 26 for receiving the band 11 between the plate 22 and the shaft 14.
At its rear end the locking plate has an upwardly bent member 27 for manually releasing the tightening mechanism 9.
The winch unit 2 comprises, as is best shown in Figs 3, 4 and 6: a drum 29 rotatably arranged on a shaft 28 in the frame 3 for unwinding and winding a flat winch band 30 of nylon having at its free end a fastener for connection to the hung tree; a control mechanism 31 for driving the drum 29; and an engageable and disengageable ratchet mechanism 32 for selectively preventing unwinding of the winch band 30.
; The control mechanism 31 is a transmission including two ~dgear wheels 33, 34 of different size, the larger gear wheel 33 of which is connected coaxially withthe drum 29 and the smaller gear wheel 34 is rotatably mounted on a shaft 35 arranged in the frame 3 and engages the large gear wheel 33 to apply an increased force on the winch band 30. The ratchet mechanism 32 includes an elongated pawl 36 a first end 37 of which selectively engages -` the small gear wheel 34, while its intermediate portion is pivotallymounted on a shaft 38 in the frame 3, and its other end 39 is operable by a cam member 41 which is arranged on a rotary shaft 40 in the frame 3, said pawl 36 being biased by means of a spring ~42, one end of which is connected to the frame 3 by means of a fastening screw 43 and the other end of which is secured in a hole in the pawl, towards a position (see Fig 3) where the pawl 36 engages the small gear wheel 34. In Fig 3 the ratchet mechanism `~
32 is shown in the position taken when the winch is working, i.e.
when the winch band 30 is being retracted. Fig 4 shows, on the contrary, the position in which the winch band is to be unwound from the drum in order to be connected to the hung tree~ These two positions (Figs 3 and 4, respectively) may be taken selectively by adjusting the cam member 41 by means of a nut 44. To wind the ~winch band 30 on the drum 29 the gear wheels 33 and 34 are brought to rotate in the direction of the arrows A and B, respective~y.
~ 4 ~9~9~
' ' ' ' ;
This rotation is brought about by turning nuts 45 and 46, respectively, by means oE a suitable tool, e.g. a self-tightening wrench of per se known type. The nut 45 is connected with a shaft 47 which is screwed tight into the shaft 28 of the drum 29 and retains the inner end of the winch band 30. The cam member 41 comprises a rotatable member 48 of generally semicylindrical shape. A fixed projection 49 delimits the rotation of the cam member, the end positions of the rotation corresponding to the two different positions of the cam member. When the ratchet mechanism l~ 32 takes the open position (Fig 4) a projection at the other end 39 of the pawl engages a recess 50 in the cam member.
As appears from Fig 6 the drum 29 has on either side a set of control and ratchet mechanisms 31 and 32, respectively, in order to obtain a uniform load on the shaft 28 of the drum, these two sets being arranged in reversed relationship, the shafts 28, 35, 38, 40 of one set being identical with the shafts of the other set.
;
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~069~
.
.
, '`: ~
. . .,, . : . . . . .
The present invention relates to a winch arrangement primarily intended for withdrawal of hung trees or other objects, in which the winch comprises a holding unit for fixing the winch to a stationary object, and a winch unit connected to a frame.
In conventional winches for withdrawal of hung trees, the hauling means used are chains or ropes of heavy and bulky construction, and the winches will therefore be difficult to handle and will require a considera~le amount of tractive power for their operation. In case the tree is tightly stuck, the direct power transmission to the l~drum, on which the hauling means is to be ~ound, is often found insufficient and some form of increase gear is required to obtain a higher gear ratio to disengage the tree from its locked position.
As logging mostly takes place on rough ground the winch should preferably be easily portable and easily operable.
The object of the invention is to provide a winch arrangement which eliminates the problems outlined above and is of simple and ine~pensive construction and easily mounted.
This object is achieved by the winch arrangement of this inven-tion, wherein the holding unit includes an elongated fastening means ~dwhich has one end secured to the frame, ~hile its intermediate portion is drawn around the stationary object and its other end is connected to the frame via a tightening mechanism, and wherein the winch unit comprises: a drum rotatably mounted on a shaft in the frame for unwinding and winding a flat band which at its free end has a fastener for connection to the tree; a control mechanism for the operation of the drum; and an engageable and disengageable ratchet mechanism for selectively preventing unwinding of the band.
The invention will be described in greater detail hereinafter with reference to the accompanying drawings, which illustrate a preferred en~bodiment and in which:-Fig 1 is a first side view of a winch according to the invention,showing a half of a winch casing and part of the holding unit in-cluded in the winch;
Fig 2 is a second side view of the winch, showing the other half of the winch casing and the remaining part of the holding unit;
Fig 3 is a side view of the winch, in which said other half of the casing is removed, thus uncovering the winch unit included in the winch;
Fig 4 shows part of the view of Fig 3, with the winch unit in ~D a different position of function;
PR/bud 2 .
':
.
.
. . .` . ' Fig 5 .is a side view of the part of the holdin~ means shown in Fig 2; and Fig 6 is an end view taken on line VI-VI in Fig 3, showing the winch unit in greater detail, the winch casing being represented by dash-dotted lines.
Figs 1, 2 and 3 show a winch arrangement primarily intended for withdrawal of hung trees. This arrangement comprises two main parts, viz. a holding means 1 for fixing the winch to a stationary object, and a winch unit 2, said units being connected to a frame 1 3. In this case the frame comprises two protectiny halves 4, ~ of a casing, which are reinforced by means of strengthening ~r~u~s 6.
The halves 4, 5 of the casing are provided with apertured lugs 7 adapted to receive fixing bolts 8 for securing the halves of the casing to each other. Another bolt 8A is provided for the same purpose.
As shown in Figs 1, 2 and 5 the holding unit ] comprises a tightening mechanism 9 mounted on the half 5 of the casing, a support 10 mounted on the half 4 of the casing, and an elongated ~astening means 11, preferably consisting of a flat band of nylon ~represented by dash-dotted lines in Fig 1. Said fastening means has one end pivotally connected to the support 10, while its intermediate portion is drawn around the stationarv object, e.g.
the trunk of a standing tree, and its other end is connected to the half 5 of the casing via the tightening mechanism 9. The ; tightening mechanism 9 includes a frame $tructurecomprising two plates 12, 13 which are spaced from each other and connected each ; to one of the strengthening ~ 6 of the half 5 of the casing.
Rotatably mounted between the plates 12, 13 is a shaft 14 comprising two parallel pins 15, 1~ positioned between the plates and spaced ~from each other so that a slot 17 is formed therebetween for receiving the free end of the band 11. A suitable tool is used to rotate the bolt head 18 of the shaft 14 whereby the band 11 is wound on the shaft 14 and is tightened so that the winch will be fixed to the stationary object. A blocking means lg is arranged - on the tightening mechanism 9 to prevent unwinding of the fastening means. The blocking means acts upon both ends of the shaft to load this uniformly. The blocking means comprises: two tooth wheels 20, 21 positioned each on one of the ends of the shaft 14;
a locking plate 22 which engages the two tooth wheels simultaneously and is slidably received in grooves in the plates 12, 13 of the '' ,~
,: ' ' . ~ . . : .
` :: . - ~
' . .
frame strUCtUre; and two sprin~s 23 which bias the locking plate 22 towards a locked position. sy "locked position" is to be under-stood the position in which the band is locked against unwinding.
The locking plate 22 comprises a generally rectangular disk having two projections 24, 25 arranged in the front part of the locking plate and running in said grooves in the plates 12 and 13, said projections engaging each one of the tooth wheels 20 and 21, respectively. The projections define between themselves a recess 26 for receiving the band 11 between the plate 22 and the shaft 14.
At its rear end the locking plate has an upwardly bent member 27 for manually releasing the tightening mechanism 9.
The winch unit 2 comprises, as is best shown in Figs 3, 4 and 6: a drum 29 rotatably arranged on a shaft 28 in the frame 3 for unwinding and winding a flat winch band 30 of nylon having at its free end a fastener for connection to the hung tree; a control mechanism 31 for driving the drum 29; and an engageable and disengageable ratchet mechanism 32 for selectively preventing unwinding of the winch band 30.
; The control mechanism 31 is a transmission including two ~dgear wheels 33, 34 of different size, the larger gear wheel 33 of which is connected coaxially withthe drum 29 and the smaller gear wheel 34 is rotatably mounted on a shaft 35 arranged in the frame 3 and engages the large gear wheel 33 to apply an increased force on the winch band 30. The ratchet mechanism 32 includes an elongated pawl 36 a first end 37 of which selectively engages -` the small gear wheel 34, while its intermediate portion is pivotallymounted on a shaft 38 in the frame 3, and its other end 39 is operable by a cam member 41 which is arranged on a rotary shaft 40 in the frame 3, said pawl 36 being biased by means of a spring ~42, one end of which is connected to the frame 3 by means of a fastening screw 43 and the other end of which is secured in a hole in the pawl, towards a position (see Fig 3) where the pawl 36 engages the small gear wheel 34. In Fig 3 the ratchet mechanism `~
32 is shown in the position taken when the winch is working, i.e.
when the winch band 30 is being retracted. Fig 4 shows, on the contrary, the position in which the winch band is to be unwound from the drum in order to be connected to the hung tree~ These two positions (Figs 3 and 4, respectively) may be taken selectively by adjusting the cam member 41 by means of a nut 44. To wind the ~winch band 30 on the drum 29 the gear wheels 33 and 34 are brought to rotate in the direction of the arrows A and B, respective~y.
~ 4 ~9~9~
' ' ' ' ;
This rotation is brought about by turning nuts 45 and 46, respectively, by means oE a suitable tool, e.g. a self-tightening wrench of per se known type. The nut 45 is connected with a shaft 47 which is screwed tight into the shaft 28 of the drum 29 and retains the inner end of the winch band 30. The cam member 41 comprises a rotatable member 48 of generally semicylindrical shape. A fixed projection 49 delimits the rotation of the cam member, the end positions of the rotation corresponding to the two different positions of the cam member. When the ratchet mechanism l~ 32 takes the open position (Fig 4) a projection at the other end 39 of the pawl engages a recess 50 in the cam member.
As appears from Fig 6 the drum 29 has on either side a set of control and ratchet mechanisms 31 and 32, respectively, in order to obtain a uniform load on the shaft 28 of the drum, these two sets being arranged in reversed relationship, the shafts 28, 35, 38, 40 of one set being identical with the shafts of the other set.
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Claims (7)
1. Winch arrangement primarily intended for withdrawal of hung trees or other objects, in which the winch comprises a holding unit for fixing the winch to a stationary object, and a winch unit connected to a frame, wherein the holding unit includes an elongated fastening means which at one end is secured to the frame, while its intermediate portion is drawn around the stationary object and its other end is connected to the frame via a tightening mechanism, and wherein the winch unit comprises: a drum rotatably mounted on a shaft in the frame for unwinding and winding a flat band which at its free end has a fastener for connection to the tree; a control mechanism for the operation of the drum; and an engageable and disengageable ratchet mechanism for selectively preventing un-winding of the band.
2. Winch arrangement as claimed in claim 1, wherein the elongated fastening means is a flat band.
3. Winch arrangement as claimed in claim 1, wherein the tightening mechanism includes a frame structure joined to the frame, a shaft rotatably mounted on the frame structure and having a longitudinally extending slot for receiving one end of the elongated fastening means, and a blocking means at at least one end of the shaft for preventing unwinding of the fastening means.
4. Winch arrangement as claimed in claim 3, wherein the tightening mechanism winds and retains one end of the elongated fastening means during the rotation of the shaft so that the frame will be fixed to the stationary object.
5. Winch arrangement as claimed in claim 3, wherein the blocking means comprises two tooth wheels each at one end of the shaft, and a manually disengageable, resiliently engageable locking means simultaneously locking both the tooth wheels.
6. Winch arrangement as claimed in claim 1, wherein the control mechanism is a transmission comprising two gear wheels of different size, the larger gear wheel of which is connected coaxially with the drum and the smaller gear wheel is rotatably mounted on a shaft arranged in the frame and engages the large gear wheel to apply an increased force on the band.
7. Winch arrangement as claimed in claims 1 and 6, wherein the ratchet mechanism includes an elongated pawl a first end of which selectively engages the small gear wheel, while its inter-mediate portion is pivotally mounted on a shaft in the frame and its other end is operable by a cam member which is arranged on a rotary shaft in the frame, said pawl being biased by means of a spring towards a position where the pawl engages the small gear wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA288,498A CA1069491A (en) | 1977-10-07 | 1977-10-07 | Winch arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA288,498A CA1069491A (en) | 1977-10-07 | 1977-10-07 | Winch arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1069491A true CA1069491A (en) | 1980-01-08 |
Family
ID=4109741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA288,498A Expired CA1069491A (en) | 1977-10-07 | 1977-10-07 | Winch arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1069491A (en) |
-
1977
- 1977-10-07 CA CA288,498A patent/CA1069491A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |