GB2119458A - Reversing gear for small marine craft - Google Patents
Reversing gear for small marine craft Download PDFInfo
- Publication number
- GB2119458A GB2119458A GB08230386A GB8230386A GB2119458A GB 2119458 A GB2119458 A GB 2119458A GB 08230386 A GB08230386 A GB 08230386A GB 8230386 A GB8230386 A GB 8230386A GB 2119458 A GB2119458 A GB 2119458A
- Authority
- GB
- United Kingdom
- Prior art keywords
- normal driving
- reversing
- transmission
- transmission means
- frictional
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
- B63H23/08—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing with provision for reversing drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Abstract
A mechanism for transmitting engine output from a drive shaft (3) to a driven shaft (5), switchable between normal driving, neutral and reversing made up of a loop type transmission gear using a belt (10) tensioned by idler 8 for forward drive with a further belt (22) in engagement with a pulley on the driven shaft (5) with belt (10) slack for reversing. The driven shaft (5) is disposed underneath the drive shaft (3) so that the driven shaft can be directly-coupled, or coupled coaxially, with a vessel's propeller shaft which is invariably set at a lower level than the drive shaft (3). <IMAGE>
Description
SPECIFICATION
Engine output taking-out mechanism for small vessels or the like
Background of the Invention
Field of the Invention
The present invention relates to an engine output taking-out mechanism for small vessels or the like, its object being to simplify the setup of a transmission gear of normal/reverse switching type to be interposed between a driving shaft extending from the engine and a driven shaft underneath thereof with incidental saving of its manufacturing cost.
Description of the PriorArt
Engine output taking-out mechanisms of normal/reverse switching type hitherto known are invariably of the so-called gear type in which engagement of gears is shifted for said switching, being relatively expensive and having a drawback of requiring an expensive clutch for shifting engagement of gears.
Summary of the Invention
A first object of the present invention is to enable low-cost manufacture of an engine output taking-out mechanism as well as cheap maintenance thereof.
For accomplishment of this object the mechanism of the invention has its transmission gear for normal/reverse switching of the interlocked relation between a drive shaft extending from the engine with a driven shaft disposed underneath made up of a loop-type transmission unit using a belt means or the like for normal driving and a counterpart of friction type for reversing.
Compared with the conventional counterparts having a gear-type transmission gear for normal/reverse switching, therefore, the mechanism of the invention is lower in the costs of component parts with no need of clutch means, hence it can be manufactured definitely cheaper, being thus ideal for use in small vessels or winches.
Also, made of parts moderate in unit price and relatively simple in construction, it allows replacement of parts without any particular skill, hence is cheap to maintain.
A second object of the present invention is to simplify the mechanism of transmitting the engine output from its output shaft to the propeller shaft of a small vessel when the mechanism of the invention is applied to a small vessel.
Generally in a small vessel a propeller shaft 32 of the vessel 31 is disposed a step lower than the drive shaft 3 of the engine 2. Hence, for transmitting the engine output from the drive shaft 3 at a higher level to the propeller shaft 32 at a lower level required is a rotation transmission gear between two vertically arranged shafts.
When the engine output taking-out mechanism of the present invention is applied to such a small vessel 31, however, it is possible to arrange a driven shaft 5 underneath the drive shaft 3 of the engine 2 at the same level with the propeller shaft 32 of the small vessel 31, hence the engine output taking-out mechanism 33 of the present invention for normal/reverse switching can also serve as the rotation transmission gear between the vertically arranged drive shaft 3 and properller shaft 32 when either the driven shaft 5 is directly coupled with the propeller shaft 32 or the input end portion of the propeller shaft 32 is used as the driven shaft 5, and with the rotation transmission gear thus omitted, the mechanism of transmitting the engine output from the drive shaft 3 of the engine 2 to the propeller shaft 32 can be simplified.
A further object of the present invention is to define, as necessary, the mutual positional relationship among the engine's drive shaft, driven shaft, tension means and frictional transmission means for reversing simply and accurately with a high precision.
For accomplishment of this object the engine's drive shaft, driven shaft, tension means and frictional transmission means for reversing are respectively positioned directly with respect to the engine bed for easy and accurate determination of their mutual, relative positions with a high precision.
By this, under preservation of the possibility to attach them to the engine bed simply, accurately positioned and efficiently, their mutual positioning error can be nearly completely eliminated so that the transmission condition therebetween can be kept optimum in either state of output transmission for normal driving or reversing for improvement of the overall transmission efficiency.
Brief Description of the Drawings
Of the appended drawings showing a preferred embodiment of the present invention,
FIG. 1 is a front view of an output taking-out mechanism of the invention in the state for normal driving;
FIG. 2 is a side view thereof;
FIG. 3 is a front view of its essential parts in the neutral state;
FIG. 4 is a front view of its essential parts in the state for reversing;
FIG. 5 is a sectional view taken along the line A-A in Fig. 1;
FIGS. 6 and 7 are schematic side views of the mechanism of the invention applied to a small vessel.
Description of the Preferred Embodiments
Referring to the appended drawings, described below are preferred embodiments of the present invention.
Shown in Figs. 1-5 is a preferred embodiment of the present invention in which an engine proper 2 of a water-cooled horizontal diesel engine E is fixedly placed on an engine bed 1 in the aft half thereof and extended from the engine proper 2 is a drive shaft 3 above the fore half of the engine bed 1.
The fore half of the engine bed 1 carries thereon å driven shaft 5 through a bearing 4 revolvable about its axis.
In this preferred embodiment the drive shaft 3 is parallel to the driven shaft 5 but this parallelism between the shafts 3 and 5 is not essential for the invention.
A drive wheel 6 and a driven wheel7 are fixedly set on the drive shaft 3 and the driven shaft 5 respectively and a tension means consisting of
V-pulleys with their axis parallel to the drive and driven wheels 6 and 7 is shiftably carried by the engine bed 1 through a lever 9.
And a transmission means 10 for normal driving consisting of 2 loops of V-belt is set over the drive and driven wheels 6 and 7 and the tension means 8.
By shifting a shifting means for normal driving I f consisting of an extension lever connected to the lever 9 the tension means 8 is shifted between the position for normal driving (Fig. 1) and the position for breaking transmission (shown by solid line in Fig. 3 and Fig. 4).
With the tensiqn means 8 in the position for normal driving, the loop-type transmission means for normal driving 10 is tensioned and the drive wheel 6 and the driven wheel 7 are interlocked thereby for normal driving (Fig. 1).
With the tension means 8 in the position for breaking transmission, the belt-type transmission means for normal driving 10 is loosened with its urge to restore by elasticity its natural circular shape but it is held in place under elastic deformation to assume the proper shape by an anti-fall plate 12 and a.holding plate 13 secured to the engine bed 1 and a holder 14 attached to the shifting means for normal driving 11 so that the loop-type transmission means for normal driving 10 is lifted off the drive and driven wheels 6 and 7 for interlocking therewith to be released (as shown by solid line in Fig. 3 and Fig. 4).
Between the lever 9 and the engine base 1 there is set a restitution spring 1 5 urging the tension means 8 toward the position for breaking transmission so that when the shifting means for normal driving 11 is released, the tension means 8 is caused to return to the position for breaking transmission, but this restitution spring 1 5 may possible be omitted.
In this embodiment provided with the restitution spring 1 5 a locking device for normal driving 1 6 is provided so that the tension means 8 is held at the position for normal driving even if the shifting means for normal driving 11 is released with the tension means 8 at the position for normal driving.
This locking device for normal driving 1 6 consists of a hook bar 1 7 pivoted on the shifting means for normal driving 11 to be freely shiftable and a locking plate 1 8 fixedly secured relative to the engine bed 1, and, when the hook bar 17 is set in a locking hole 19 in the locking plate 18 with the tension means 8 at the position for normal driving, the tension means 8 is locked through the shifting means 11 at the position for normal driving.
Engagement of the hook bar 17 in the locking hole 1 9 is effected automatically when the tension means 8 is brought to the position for normal driving by shifting the shifting means for normal driving 11 with the hook bar 1 7 then dropping into the locking hole 1 9 under its own weight but for releasing this engagement the hook bar 17 has to be lifted by hand.
This locking device for normaldriving 16, however, may possibly be omitted, too.
To the engine bed 1 a frictional transmission means supporting arm 20 is pivoted shiftably and this, in turn, has pivoted at its free end an idle wheel 21 rotatably.
A frictional transmission means for reversing 22 consisting f another loop of V-belt is set to connect the drive wheel 6 and the idle wheel 21.
The frictional transmission means supporting arm 20 has connected to it a shifting means for reversing 23 consisting of an extension lever and the frictional transmission means supporting arm 20 is arranged to be shiftable between-the position for breaking transmission and the position for reversing by means of this shifting means for reversing 23.
- When the frictional transmission means supporting arm 20 is at the position for breaking transmission (shown by two-dot chain line in Fi'g.
1 and Fig. 4), the frictional transmission means 22 is off the outer peripheral face 24 of the driven wheel 7 andthe interlocking between the frictional transmission means 22 and the driven wheel 7 is thus released.
When the frictional transmission means supporting arm 20 is at the position for reversing (shown by solid line in Fig. 4), the outer peripheral face 25 of the frictional transmission means 22 is in contact with the outer peripheral face 24 of the driven wheel 7, and the driven wheel 7 is interlocked through the frictional transmission means 22 to be driven reverse to the drive wheel 7.
Another restitution spring 26 is set between the frictional transmission means supporting arm 20 and the engine base 1 so that the frictional transmission means supporting arm 20 automatically returns to the position for breaking transmission when the shifting means for reversing 23 is released. This restitution spring 26, however, may possibly be omitted.
The above setup allows easy checking, maintenance and repair etc. Of the above mechanism, probably the only parts vulnerable to wear and damage are the belt-type transmission means for normal driving 1 0 and the frictional transmission means 22 which need regular checking and maintenance, and it is easy to replace these V-belts.
In the embodiment described above, an alternative is possible in which the shifting means for normal driving 11 is connected with the frictional transmission means supporting arm 20 so that it can also serve as the shifting means for reversing 23 with the frictional transmission means supporting arm 20 located at the position for breaking transmission when the tension means 8 is at the position for normal driving and the same at the position for reversing when the tension means 8 is at the position for braking transmission.
When the shifting means for normal driving 11 is used also as the shifting means for reversing 23, it is also possible to make the shifting means 11 shiftable between 3 alternative positions for normal driving,.neutral and reversing and so arrange that the tension means 8 is at the position for normal driving and the frictional transmission means supporting arm 20 at the position for breaking transmission when it is set to the position for normal driving, both the tension means 8 and the frictional transmission means supporting arm 20 are at the position for breaking transmission when it is set to the neutral position and the tension means 8 is at the position for breaking transmission and the frictional transmission means supporting arm 20 at the position for reversing when it is set to the position for reversing respectively.
It is further possible to interpose between the shifting means for normal driving and reversing 11 and 23 an interlocking device for ensuring against simultaneous location of the tension means 8 and the frictional transmission means supporting arm 20 at the position for normal driving and the position for reversing respectively so that both the drive and the driven wheels 6 and 7 are interlocked for either rrormai driving or reversing.
It is still further possible to have the frictional transmission means for reversing 22 composed of frictional wheels interlocked to be driven in the same sense as the drive wheel 6 through an odd number of intermediate frictional transmission wheels so that with the outer peripheral face of the frictional wheel is in -contact with the outer peripheral face of the driven wheel for the driven wheel to be interlocked to turn reverse to the drive wheel.
It is also possible to make the idle wheel 21 in the above embodiment as a frictional wheel for its outer peripheral face to come into and go out of contact with the outer peripheral face 24 of the driven wheel 7.
Claims (5)
1. An engine output taking-out mechanism for a small vessel or the like, wherein a drive shaft 5 is disposed underneath a drive shaft 3 extending from an engine proper 2, a drive wheel 6 fixedly set on said drive shaft 3, a driven wheel 7 fixedly set on said driven shaft 5 and a tension means 8 are connected by a loop-type transmission means
10 set externally thereon so that said drive wheel 6 and said driven wheel 7 are interlocked for normal driving by said transmission means for normal driving 10 when said tension means 8 is advanced to a position for normal driving by means of a shifting means for normal driving 11 for tensioning said loop-type transmission means for normal driving 10, said (oop-type transmission means 10 is caused to deform. elastically by a holder 14 for said loop-type transmission means for normal driving 10 to be lifted off said drive wheel 6 and said driven wheel 7 so as to release interlocking thereof when said tension means 8 is retracted to a position for breaking transmission by said shifting means for normal driving 11 for loosening said loop-type transmission means 10, while, on the other hand, a frictional transmission means for reversing 22 is carried by a frictional transmission means supporting arm 20 pivoted shiftably on an engine bed 1 with frictional transmission means supporting arm 20 shiftable between a position for breaking transmission and a position for reversing so that said frictional transmission means 22 interlocked to run in the same sense as said drive wheel 6 comes off an external peripheral face 24 of said driven wheel 7 when said frictional transmission means supporting arm 20 is located at said position for breaking transmission, and said external peripheral faces 24 and 25 of said frictional transmission means 22 and said driven wheel 7 come into contact with each other to be interlocked when said frictional transmission means supporting arm 20 is located at said position for reversing.
2. An engine output taking-out mechanism recited in claim 1, wherein said shifting means for normal driving 11 is interlocked with said frictional transmission means supporting arm 20 to serve also as said shifting means for reversing 23 and it is so arranged that said frictional transmission means supporting arm 20 is at said position for breaking transmission when said tension means 8 is located at said position for normal driving and said frictional means supporting arm 20 is at said position for reversing when said tension means 8 is located at said position for breaking transmission.
3. An engine output taking-out mechanism recited in claim 1 , wherein there is provided a restitution spring 1 5 for urging said tension means 8 toward said position for breaking transmission so that said tension means is automatically returned to said position for breaking transmission when said shifting means for reversing is released, and also another restitution spring 26 for urging said frictional transmission means supporting arm 20 toward said position for breaking transmission so that said frictional transmission means supporting arm 20 is automatically returned to said position for breaking transmission when said shifting means for reversing 23 is released.
4. An engine output taking-out mechanism recited in claim 1 or 3, wherein an interlocking device is interposed between said shifting means for normal driving and reversing 11 and 23 for ensuring against simultaneous location of said tension means 8 and said frictional transmission means supporting arm 20 at said position for normal driving and said position for reversing respectively.
5. An engine output taking-out mechanism for a small vessel or the like, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6031382U JPS58162351U (en) | 1982-04-23 | 1982-04-23 | Output extraction device for engines of small ships, etc. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2119458A true GB2119458A (en) | 1983-11-16 |
| GB2119458B GB2119458B (en) | 1985-06-19 |
Family
ID=13138551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08230386A Expired GB2119458B (en) | 1982-04-23 | 1982-10-25 | Reversing gear for small marine craft |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS58162351U (en) |
| GB (1) | GB2119458B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8753239B2 (en) | 2008-12-19 | 2014-06-17 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power transmission device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4713536B2 (en) * | 2007-04-20 | 2011-06-29 | 株式会社クボタ | Combine |
| JP5002042B2 (en) * | 2010-08-06 | 2012-08-15 | 株式会社クボタ | Combine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB583376A (en) * | 1944-07-05 | 1946-12-17 | Clifford Edwards Ltd | Improvements in or relating to cranes |
| GB948403A (en) * | 1961-06-03 | 1964-02-05 | Wolseley Engineering Ltd | Improvements in and relating to drive-transmissions |
| GB1415306A (en) * | 1972-09-22 | 1975-11-26 | Cooper F E | Transmission units |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS521978Y2 (en) * | 1972-03-18 | 1977-01-18 |
-
1982
- 1982-04-23 JP JP6031382U patent/JPS58162351U/en active Granted
- 1982-10-25 GB GB08230386A patent/GB2119458B/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB583376A (en) * | 1944-07-05 | 1946-12-17 | Clifford Edwards Ltd | Improvements in or relating to cranes |
| GB948403A (en) * | 1961-06-03 | 1964-02-05 | Wolseley Engineering Ltd | Improvements in and relating to drive-transmissions |
| GB1415306A (en) * | 1972-09-22 | 1975-11-26 | Cooper F E | Transmission units |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8753239B2 (en) | 2008-12-19 | 2014-06-17 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power transmission device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2119458B (en) | 1985-06-19 |
| JPS62448Y2 (en) | 1987-01-08 |
| JPS58162351U (en) | 1983-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |